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Short answer: Choose the KINTO CAST Water Jug 1.2 L (40.8 oz, $33.40 on KINTO USA) if you keep iced tea or water in the fridge for a household. It holds 60% more than the 750 ml for only $3.10 more, at about $0.82 vs $1.19 per ounce (our math). Choose the 750 ml (25.5 oz, $30.30) if you drink alone, your fridge door shelf is short, or you want a lighter jug: about 6.6 in tall and 260 g empty, versus 9.4 in and 370 g. Both are 90 mm (3.5 in) across, made of heat-resistant glass that takes freshly brewed hot tea, and microwave and dishwasher safe. Neither is leakproof, so store them upright.
How we compare: every spec and price below comes from KINTO’s official pages (KINTO USA 750 ml, KINTO USA 1.2 L, KINTO Japan 750 ml, KINTO Japan 1.2 L) and KINTO’s spare-part pages. We don’t run hands-on tests. Where we summarize Japanese third-party reviews, we say so. Last updated: November 2026.
Quick Comparison Table
| Spec (official) | CAST Water Jug 750 ml | CAST Water Jug 1.2 L |
|---|---|---|
| Product number | 21676 | 21677 |
| Capacity | 750 ml / 25.5 oz | 1.2 L / 40.8 oz |
| Diameter | 90 mm (3.5 in) | 90 mm (3.5 in) |
| Height | 168 mm (KINTO USA) / 170 mm (KINTO Japan), about 6.6 in | 240 mm (about 9.4 in) |
| Width with handle | 142 mm (USA) / 140 mm (Japan), about 5.6 in | 140 mm (about 5.5 in) |
| Weight (empty) | about 260 g (9.2 oz) | about 370 g (13.1 oz) |
| Material | Heat-resistant glass jug and lid, silicone ring | |
| Heat limits | Max temperature differential 120°C / 248°F; silicone 140°C / 284°F | |
| Microwave / dishwasher | Both safe, per KINTO | |
| KINTO USA price | $30.30 | $33.40 |
| Price per fl oz (our math) | about $1.19 | about $0.82 |
| KINTO Japan price (tax incl.) | ¥2,640 | ¥2,860 |
Specs and prices checked on KINTO USA and KINTO Japan on November 10, 2026 (Asia/Tokyo). Weights are from KINTO Japan; the U.S. pages do not list weight.
Key differences at a glance
- Capacity: 750 ml vs 1.2 L, so the large jug holds 1.6 times as much.
- Height: about 6.6 in vs 9.4 in. The footprint is the same 90 mm circle.
- Weight: about 260 g vs 370 g empty. A full 1.2 L jug weighs roughly 1.6 kg (3.5 lb) with water, our estimate.
- Price: $30.30 vs $33.40 on KINTO USA, a $3.10 gap.
- Same on both: heat-resistant glass body and lid, a removable silicone ring, the same handle design, microwave and dishwasher care, and the same spare lid (product 47895) for both sizes.
1. Capacity: who should buy which size?
KINTO’s CAST line is built around what it calls an “uninterfering design.” KINTO says the handle angle is designed to relieve stress on the wrist as the center of gravity changes while you pour. Both jugs share that design. The only real decisions are how much you drink and where the jug has to fit.
Choose the 750 ml (21676) if you:
- Drink cold tea or water mostly on your own, or brew a fresh batch every day
- Have a short fridge door shelf, or want the jug to sit on a crowded main shelf
- Want a lighter jug for serving at the table or for someone with less grip strength
Choose the 1.2 L (21677) if you:
- Keep iced tea, barley tea, or water in the fridge for two or more people
- Brew hot tea in bulk and let it cool in the jug
- Want the better price per ounce ($33.40, about $0.82/oz)
2. Hot tea, cold brew, and the microwave
This is the main reason to pick glass over a plastic pitcher. KINTO lists a maximum temperature differential of 120°C / 248°F for the heat-resistant glass, and KINTO Japan classifies the jug for boiling-water use and microwave use. That means you can brew tea with freshly boiled water right in the jug, then refrigerate it once it has cooled.
KINTO’s warnings are the same for both sizes. Sudden temperature changes can break the glass, so while it is hot, do not pour in cold liquid and do not set it on a wet cloth or a wet counter. Do not overheat it in the microwave or heat it empty. KINTO does not list stovetop or oven use, so don’t put it on a burner.
The jug has no built-in tea strainer. If you want to cold-brew loose leaf tea and pour without a separate filter, a jug with a strainer, like the Hario Mizudashi Tea Pot, is the better tool. With the CAST jug, use tea bags or strain the tea first.
3. Fridge-door fit and storage
Both jugs have the same 90 mm (3.5 in) diameter and about 140 mm (5.5 in) width with the handle, so the real fit question is height. The 1.2 L is 240 mm (about 9.4 in) tall and the 750 ml is 168 to 170 mm (about 6.6 in). Measure the clear height above your door bin and its depth before buying. In a door bin, the handle needs room to point sideways or toward the door.
KINTO Japan’s 750 ml page adds two notes that matter for storage. The jug is not fully sealed, so keep it level to avoid spills. And do not carry it by the lid, because the jug can drop from the lid and break. That means no lying it on its side in the fridge and no tossing it in a bag.
4. Care and spare parts
Both sizes are dishwasher safe and microwave safe. For hand washing, KINTO says not to use abrasive cleansers or steel wool. The jug has a wide 90 mm opening and only three parts to wash: the jug, the glass lid, and the silicone ring.
The lid is shared between the two sizes. KINTO USA lists the CAST water jug 750ml/1.2L lid (47895) at $6.30, but it was sold out when we checked. KINTO Japan sells the same lid for ¥550 and the silicone ring by itself (47904) for ¥220.
5. Price and availability
On KINTO USA (November 10, 2026, Asia/Tokyo): 750 ml $30.30 and 1.2 L $33.40, both in stock in Clear. Prices can differ on Amazon, so use the Check price buttons and confirm “CAST” and the size on the listing.
A View from Japan
In Japan the jug is sold as the CAST ウォータージャグ (CAST water jug), and a jug like this is a common way to keep a day’s barley tea (mugicha) cold in the fridge. KINTO Japan’s official store lists ¥2,640 for the 750 ml and ¥2,860 for the 1.2 L, tax included. KINTO Japan also sells the CAST AMBER jug in the same two sizes (¥4,400 / ¥4,620), and a plastic PLUG water jug 1.2L (¥2,420).
| Item | KINTO Japan official store |
|---|---|
| Japanese name | CAST ウォータージャグ 750ml / 1.2L |
| Price (tax included) | ¥2,640 / ¥2,860 |
| Weight | about 260 g / about 370 g |
| Use category | For boiling water and microwave use (熱湯用、電子レンジ用) |
| Spare parts | Lid (750ml/1.2L) ¥550; silicone ring ¥220 |
Japanese reviewers on a large Japanese shopping site (Rakuten) and a Japanese product blog mostly praise the 1.2 L jug’s simple look, its wide mouth that you can reach into with a sponge, the small number of parts, and being able to pour in freshly boiled tea. Several say it fits their fridge door pocket, and one blogger keeps two side by side. The common complaints are that the glass feels thin and some buyers have broken one, that the contents can spill if you tilt it or fill it to the top, that the silicone ring has to be fitted the right way up, and that a small pocket can leave the handle in the way. (Third-party reviews, not our own testing.)
FAQ
Should I buy the KINTO CAST Water Jug 750ml or 1.2L?
Buy the 1.2 L (40.8 oz, $33.40 on KINTO USA when we checked) if you keep a jug of iced tea or water in the fridge for two or more people: it holds 60% more for $3.10 more, and the price per ounce is lower (about $0.82 vs $1.19, our math). Buy the 750 ml (25.5 oz, $30.30) if you drink alone, have a short fridge door shelf, or want a lighter jug for the table: it is 168 to 170 mm (about 6.6 in) tall and about 260 g empty, versus 240 mm (about 9.4 in) and about 370 g for the 1.2 L. Both are 90 mm (about 3.5 in) across and use the same glass lid.
Can I pour hot tea into the KINTO CAST Water Jug?
Yes. KINTO makes both sizes from heat-resistant glass and lists a maximum temperature differential of 120°C / 248°F, and KINTO Japan classifies the jug for boiling-water use and microwave use. KINTO warns that sudden temperature change can break it: while the glass is hot, do not pour in cold liquid or set it on a wet cloth or wet surface. KINTO does not list stovetop or oven use.
Will the 1.2L jug fit in a refrigerator door?
It depends on your fridge. KINTO lists the 1.2 L at 90 mm across, 240 mm tall, and 140 mm wide including the handle (about 3.5 × 9.4 × 5.5 in). Japanese buyers often say it fits their fridge door pocket, but at least one says the handle gets in the way in a small pocket. Measure the height under the shelf above your door bin and the depth of the bin before you buy. The 750 ml is 70 mm shorter.
Is the KINTO CAST Water Jug leakproof?
No. KINTO Japan’s 750 ml page says the jug is not fully sealed, so keep it level so the contents do not spill. It also says not to carry the jug by the lid, because the jug can drop from the lid and break. Store it upright, and do not lay it on its side in the fridge.
Is the KINTO CAST Water Jug dishwasher safe?
Yes. KINTO lists both sizes as dishwasher and microwave safe. For hand washing, KINTO says not to use abrasive cleansers or steel wool. The lid and the silicone ring come off, and KINTO sells both as spare parts.
What is the jug made of?
The jug and its lid are heat-resistant glass, and the ring on the lid is silicone. KINTO lists a 140°C / 284°F upper temperature tolerance for the silicone. Both sizes are made in China.
Verdict
For most households, the 1.2 L is the better buy: 60% more capacity for $3.10 more, the same 90 mm footprint, and a lower price per ounce. Get the 750 ml if you drink alone, brew fresh every day, or your fridge door shelf can’t take a 9.4-inch jug. Either way, you get a heat-resistant glass jug that takes hot tea and goes in the dishwasher, but not a sealed bottle you can lay down or carry.
Check current listings
Amazon results for “KINTO CAST water jug” can mix in the CAST AMBER jug, KINTO’s plastic PLUG and CAPSULE jugs, the CAST one touch teapot, CAST glasses, and jugs from other brands. Confirm CAST, water jug, and 750 ml or 1.2 L on the listing before you buy.
Related comparisons
- Hario Mizudashi Tea Pot vs Filter-in Bottle (cold-brew tea with a built-in strainer)
- Hario Filter-in Bottle 300ml vs 750ml
- Hario Clear Tea Pot 450ml vs 700ml
- KINTO UNITEA One Touch Teapot 460ml vs 720ml
- Hario Mizudashi Cold Brew Coffee 600 vs 1000 mL
Sources
- KINTO USA, CAST water jug 750ml: https://kinto-usa.com/products/21676
- KINTO USA, CAST water jug 1.2L: https://kinto-usa.com/products/21677
- KINTO USA, CAST water jug 750ml/1.2L lid: https://kinto-usa.com/products/47895
- KINTO Japan, CAST ウォータージャグ 750ml: https://kinto.co.jp/products/21676
- KINTO Japan, CAST ウォータージャグ 1.2L: https://kinto.co.jp/products/21677
- KINTO Japan, lid and silicone ring: https://kinto.co.jp/products/47895, https://kinto.co.jp/products/47904
- U.S. SaferProducts.gov recalls database: https://www.saferproducts.gov/
- Japanese review summaries: Rakuten reviews, CAST water jug 1.2L; Soredoko review of the CAST water jug 1.2L
Specs and prices checked November 10, 2026 (Asia/Tokyo). We found no U.S. SaferProducts.gov recall for KINTO when we checked. Prices and availability change, so verify the current listing before buying.
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