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KINTO Water Bottle 300ml vs 500ml: 10 oz or 17 oz?

A shorter smoke-gray and a taller light blue clear plastic water bottle with round shoulders and handled screw lids on a wooden table

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Short answer: Get the KINTO Water Bottle 300ml (10 oz, $14.60 at KINTO USA) if you want a light, pocket-size bottle for a small bag, a desk or short trips: it is 6.2 in tall and weighs about 60 g (2.1 oz) empty. Get the 500ml (17 oz, $17.40) if you want fewer refills: it holds two-thirds more water but is only 1.8 in taller and about 15 g heavier. Both use the same one-twist lid and silicone ring, the same recycled copolyester and the same five colors. Neither is insulated, and neither is for hot drinks.

How we compare: every spec in this article comes from KINTO’s official pages and manuals (starting with KINTO USA’s Water Bottle page and KINTO Japan’s Water Bottle page), all listed under Sources below. We don’t run hands-on tests, and if a spec isn’t published, we say so. Last updated: October 2026.

Check price: KINTO Water Bottle 300ml (10 oz)
Check price: KINTO Water Bottle 500ml (17 oz)

KINTO is a Japanese housewares brand from Shiga Prefecture, best known for its tea and coffee ware and its tumblers. The WATER BOTTLE is its simple, clear plastic bottle: a round body, a lid that opens with one full turn, and a small handle on top. KINTO USA describes it as “lightweight and compact,” and the current version is made with over 50% certified recycled content. It comes in 300ml, 500ml and 950ml. The 300ml and 500ml share the lid and silicone ring, so the choice between them comes down to how much you drink between refills and how tall a bottle your bag can take.

Quick Comparison Table

Spec KINTO Water Bottle 300ml KINTO Water Bottle 500ml
Capacity 300 ml / 10 oz 500 ml / 17 oz
Size with lid φ2.6 x H6.2 in (φ65 x H155 mm) φ2.8 x H8.0 in (φ70 x H200 mm)
Height without lid 5.1 in (128 mm) 6.9 in (172 mm)
Empty weight Approx. 0.1 lb (approx. 60 g / 2.1 oz) Approx. 0.2 lb (approx. 75 g / 2.6 oz)
Lid One-twist screw lid with carry handle Same lid (shared part)
Silicone ring Removable; same part as 500ml Removable; same part as 300ml
Material Copolyester bottle and lid, over 50% certified recycled content; silicone seal Same
Heat limit Bottle and lid 176°F (80°C); seal 212°F (100°C) Same
Insulated? No (plastic bottle, no temperature rating) No
Dishwasher Yes, upper basket Same
Colors Clear, amber, smoke, blue, green Same
Item numbers 20121–20125 20131–20135
Made in China China
KINTO USA price $14.60 $17.40
Japan price (tax incl.) ¥1,320 ¥1,540

Specs and U.S. prices from KINTO USA (kinto-usa.com); millimeter sizes, gram weights and yen prices from KINTO Japan (kinto.co.jp), checked October 29, 2026. Ounce conversions of the gram weights are ours. On KINTO USA, all five colors of the 300ml were in stock; the 500ml was in stock in amber, smoke, blue and green, with clear sold out.

Key differences at a glance

  • Capacity: 300 ml (10 oz) vs 500 ml (17 oz), about 67% more in the 500ml.
  • Height: 6.2 in vs 8.0 in with the lid (155 vs 200 mm). The 500ml is also slightly wider, 2.8 in vs 2.6 in (70 vs 65 mm).
  • Weight: about 60 g vs 75 g empty, a 15 g (about half an ounce) difference.
  • Price: $14.60 vs $17.40 at KINTO USA, $2.80 more for the larger size.
  • Same on both: one-twist lid with handle (the same part), removable silicone ring, copolyester with over 50% recycled content, 176°F (80°C) limit, dishwasher safe, BPA free, five colors, made in China.

1. Capacity and Everyday Use

The 300ml holds about 10 oz, a bit more than a standard 8 oz cup. The 500ml holds about 17 oz, close to a typical single-serve bottle of water. KINTO doesn’t assign either size to a specific use, but the numbers point to a simple split:

  • 300ml: for short outings, a small purse or tote, a bedside table, or anyone who refills often at a desk, office or water fountain.
  • 500ml: for a commute, a gym session or an afternoon out when you won’t pass a refill point for a while.

Because neither bottle is insulated, size doesn’t change how long a drink stays cold. KINTO publishes no temperature-retention figures for the Water Bottle. If you want ice water that stays cold for hours, an insulated bottle like the one in our Zojirushi SD-KA60H vs SD-KA75H guide is the better fit.

2. Size, Weight and Carrying

This is where the two differ most. With the lid on, the 300ml is φ2.6 x H6.2 in (φ65 x H155 mm) and the 500ml is φ2.8 x H8.0 in (φ70 x H200 mm). Without the lid, the bodies are 5.1 in (128 mm) and 6.9 in (172 mm) tall. KINTO Japan lists the empty weights as about 60 g and 75 g; KINTO USA rounds them to about 0.1 lb and 0.2 lb.

Once filled, the gap grows. Water weighs about 1 g per ml, so by our estimate a full 300ml bottle weighs about 360 g (12.7 oz) and a full 500ml about 575 g (20.3 oz). The light empty weight is the main reason to pick this bottle over a stainless one: KINTO’s stainless Travel Tumbler (covered in our KINTO Travel Tumbler 350ml vs 500ml comparison) is insulated but weighs about 245 g (350ml) or 310 g (500ml) empty, per KINTO.

Both sizes have the same handle on the lid, which KINTO says fits the hand for carrying. KINTO doesn’t publish cup-holder fit, so compare your holder with the 2.6 in and 2.8 in diameters. KINTO USA also sells a separate BOTTLE STRAP ($15.00, adjustable 28–56 in), which it says is only suitable for KINTO plastic bottles and should not be worn around the neck.

3. The Lid and What You Can Put In

Both sizes use the same lid. KINTO says it opens with a single twist, and the English manual describes the opening as large enough to add drinks easily and comfortable to drink from. A removable silicone ring seals the lid. KINTO doesn’t publish the inner opening diameter; the lid itself is φ46 x H36 mm (about 1.8 x 1.4 in).

KINTO’s rules apply to both sizes:

  • Temperature: the bottle and lid are rated to 176°F (80°C). KINTO Japan says not to pour in boiling water, and not to microwave it or put it near a flame.
  • Carbonated drinks: KINTO Japan’s FAQ lists only certain tumblers (To Go Tumbler, Trail Tumbler, Water Tumbler) as OK for carbonated drinks. The Water Bottle isn’t on that list. Dry ice is not allowed.
  • Citrus: KINTO Japan says not to use drinks that contain citrus, because terpene from the peel can damage the plastic.
  • Freezer: not allowed; KINTO Japan says the resin may degrade or crack.
  • Filling and carrying: don’t overfill, because liquid can overflow when you close the lid. Don’t shake it, swing it around or drop it, and don’t leave drinks in it for a long time.
  • Heat: don’t leave it in a hot car.

4. Cleaning and Care

Both sizes come apart into the same three pieces: bottle, lid and silicone ring. KINTO says the silicone parts are easy to remove, and the inside bottom is rounded so residue doesn’t collect. From KINTO USA’s care notes:

  • Dishwasher: safe; put it in the upper basket so force and weight don’t distort it.
  • Don’t: use abrasive cleansers or steel wool.
  • After use: wash right away, dry well and keep it dry when you aren’t using it.

KINTO Japan adds that faint lines or polishing marks on the bottle come from the manufacturing process and are normal. The 300ml is shorter, so a bottle brush reaches the bottom more easily, but KINTO doesn’t say either size is easier to clean.

5. Practical Costs, Price and Where to Buy

At KINTO USA, the 300ml is $14.60 and the 500ml is $17.40. On October 29, 2026, all five colors of the 300ml were in stock, and the 500ml was in stock in amber, smoke, blue and green (clear was sold out). That works out to about $1.43 per ounce for the 300ml and $1.02 per ounce for the 500ml, using KINTO USA’s 10.2 oz and 17.0 oz figures. KINTO USA offers free shipping on orders of $100 or more.

The wear parts are shared and cheap: the 300ml / 500ml lid is $7.00 in all five colors, and the 300/500ml silicone ring set of 2 is $3.80. So if a ring wears out or a lid gets lost, you don’t need to replace the whole bottle.

Other KINTO Water Bottle sizes

Model Capacity Size with lid Empty weight KINTO USA price Note
WATER BOTTLE 300ml 300 ml / 10 oz φ2.6 x H6.2 in Approx. 60 g $14.60 This comparison
WATER BOTTLE 500ml 500 ml / 17 oz φ2.8 x H8.0 in Approx. 75 g $17.40 This comparison
WATER BOTTLE 950ml 950 ml / 32 oz W3.3 x H9.8 in Approx. 120 g $26.00 Own lid and ring (not shared with 300/500ml)

U.S. sizes and prices from KINTO USA; weights from KINTO Japan, checked October 29, 2026. The 950ml was in stock in amber, smoke, blue and green, with clear sold out.

The 950ml (32 oz) is the size for a full day at a desk or for keeping a liter of water close by. At 9.8 in tall, it won’t fit many bag pockets, and it uses its own lid ($7.00) and ring set ($3.80) rather than the 300/500ml parts; check the 950ml on Amazon. For a kids’ bottle with a straw and insulation, see our Thermos FUNtainer 12 oz vs 16 oz guide.

Who Should Buy Which?

Choose the KINTO Water Bottle 300ml if you:

  • Want the smallest, lightest option: 6.2 in tall, about 60 g empty
  • Carry a small bag or purse
  • Refill often at a desk, school or office
  • Want a small bottle for an older family member or a bedside table

Choose the KINTO Water Bottle 500ml if you:

  • Want one fill to last a commute, a workout or an afternoon
  • Have room for an 8.0 in tall bottle
  • Want the lower price per ounce ($1.02 vs $1.43)
  • Are fine with amber, smoke, blue or green for now (the clear 500ml was sold out at KINTO USA on October 29, 2026)

A View from Japan

In Japan, KINTO sells the bottle as the ウォーターボトル (“water bottle”) with the same item numbers as in the U.S. (20121–20125 for 300ml, 20131–20135 for 500ml). The Japanese page frames it as a light, compact bottle for everyday hydration, and makes a point American pages don’t: the opening is sized so you can fill it easily from a water server, the kind of dispenser common in Japanese homes and offices. KINTO Japan lists the material as PCT resin, and the bottle’s manual names it Tritan™ Renew. On its KINTO LOOP page, KINTO Japan says Tritan Renew is made with over 50% material from recycled food and drink containers through molecular recycling, performs the same as regular copolyester and is BPA free.

The Japanese page also has a longer list of cautions than the U.S. one. The ones that matter most outside Japan are no boiling water, no drinks containing citrus, no freezer, and no leaving it in a hot car. KINTO Japan sells the same 300/500ml lid and silicone ring 2-pack as spare parts.

Item Japan (KINTO official)
Japanese name ウォーターボトル (“water bottle”) 300ml / 500ml / 950ml
Material (Japanese spec) PCT resin; the manual names it Tritan™ Renew, a copolyester with over 50% recycled content
Official store price (tax incl.) 300ml ¥1,320; 500ml ¥1,540; 950ml ¥1,980
Spare parts (tax incl.) 300/500ml lid ¥440 (φ46 x H36 mm, approx. 15 g); silicone ring 2-pack ¥330
Refilling KINTO Japan says the opening makes it easy to fill from a water server
Not allowed (Japanese page) Boiling water, carbonated or dry ice use, freezing, drinks containing citrus, leaving it in a hot car

Japanese names, specs, cautions and prices from KINTO Japan (kinto.co.jp), its support FAQ and the Japanese/English Water Bottle manuals, checked October 29, 2026. Prices include Japanese consumption tax.

Japanese reviewers on Rakuten (a KINTO retailer’s listing with 67 reviews averaging 4.79 out of 5 when we checked) most often praise how light it is and the pretty, see-through colors. Several say it didn’t leak even when carried upside down, and they like that it has few parts, goes in the dishwasher and has a silicone ring with a tab that is easy to pull off. One buyer chose the 300ml for walking around town because stainless bottles felt too heavy, and another bought it for an elderly father. One reviewer said the 500ml looks compact next to a 500ml stainless bottle. Some parents mention using it to carry cooled boiled water for baby formula. On the negative side, one buyer said the spout hits your nose when the bottle is half empty, one said a dish dryer alone doesn’t dry the inside, one said a lid deformed after touching a dish dryer’s heating element, and one found it a bit pricey. (Third-party reviews, not our own testing.)

KINTO Water Bottle 300ml vs 500ml: Frequently Asked Questions

Should I get the KINTO Water Bottle 300ml or 500ml?

Get the 300ml (10 oz, $14.60 at KINTO USA) if you want the smallest bottle for a small bag, a desk or a short outing: it is 6.2 in tall and about 60 g empty. Get the 500ml (17 oz, $17.40) if you want one refill to last most of a morning or a workout: it holds two-thirds more but is only 1.8 in taller and about 15 g heavier. Both use the same lid, silicone ring, material and colors.

Can I put hot coffee or tea in the KINTO Water Bottle?

Not hot drinks. KINTO lists an upper temperature limit of 176°F (80°C) for the bottle and lid, and KINTO Japan says not to pour in boiling water. It is also a plastic bottle with no insulation rating, so warm drinks will cool and cold drinks will warm at room speed. For hot coffee, look at an insulated stainless tumbler instead.

Is the KINTO Water Bottle leak-proof?

KINTO doesn’t use the word “leak-proof” on its product pages. Its Japanese cautions say to fit the silicone ring correctly, not to overfill (liquid can overflow when you close the lid), and not to shake the bottle, because the contents may spray out. Japanese buyer reviews mostly report no leaks when the lid is closed properly.

Is it dishwasher safe?

Yes. KINTO USA says the bottle is dishwasher safe and asks you to place it in the upper basket so force and weight don’t distort it. Don’t use abrasive cleansers or steel wool, and dry it well after washing.

Can I put soda, juice or ice in it?

Ice: KINTO doesn’t limit regular ice, but dry ice is not allowed. Soda: KINTO Japan’s FAQ lists only certain tumblers as OK for carbonated drinks, and the Water Bottle is not one of them, so skip sparkling drinks. Juice: KINTO Japan says not to use drinks that contain citrus, because a compound in the peel (terpene) can damage the plastic.

Can I freeze the KINTO Water Bottle?

No. KINTO Japan says the bottle should not go in the freezer, because the resin may degrade or crack. It also can’t go in the microwave.

Do the 300ml and 500ml bottles share parts?

Yes. KINTO USA sells one “300ml / 500ml” lid ($7.00) and one 300/500ml silicone ring set of 2 ($3.80) that fit both sizes. The 950ml bottle uses its own lid and ring.

Is the KINTO Water Bottle BPA free?

Yes. KINTO USA lists it as BPA free. The bottle and lid are copolyester made with over 50% certified recycled content, which KINTO Japan identifies as Tritan Renew.

Check current listings

Amazon search results for “KINTO water bottle” often mix this bottle with other KINTO models, such as the stainless Travel Tumbler, Trail Tumbler and Water Tumbler, the Active Bottle, Kids Water Bottle and To Go Tumbler, plus the 950ml size and lids or silicone rings sold on their own. Some older listings may also show earlier item numbers. Check that the listing says “WATER BOTTLE” and 300ml or 500ml, and ideally the item number (20121–20125 or 20131–20135), before you buy.

Check price: KINTO Water Bottle 300ml (10 oz)
Check price: KINTO Water Bottle 500ml (17 oz)

Sources

Specs checked October 2026. We found no recalls for KINTO products in the U.S. CPSC recall database when we checked. Prices and availability change, so check the current listing before buying.

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