There is almost no such thing as a 1 litre steel cup, because a litre is past the volume a hand can comfortably raise and drink from. Open steel vessels of that size are serving or measuring vessels — lotas, jugs, canteen tumblers — not drinking cups. If what you want is a litre-ish drinking vessel you keep beside you, the honest format is a lidded insulated tumbler, and HYV's are 1.2L: the HydroPro 1.2L at ₹1,499 is one. Its retention is 12 hours cold and 8 hours hot, which is lower than a sealed bottle and the price of a wide opening. HYV makes no 1 litre open cup and no steel mug of any capacity.
Key Facts
- A litre of water weighs about one kilogram before you add the vessel.
- HYV's insulated tumblers at this volume are 1.2L, not 1L.
- 1.2L tumblers are rated 12 hours cold and 8 hours hot.
- The HydroPro 1.2L is ₹1,499. The HydroPop 1.2L is ₹1,699.
- HYV makes no handled steel mug at any capacity and no 1 litre open cup.
A litre is past the size a hand drinks from
Hold a litre of water in an open vessel and lift it to your mouth. It weighs about a kilogram, the centre of mass sits high, and the liquid moves as you tilt. That is why drinking cups across every culture stop somewhere around 350–500ml: beyond that, the vessel stops being something you drink from and becomes something you pour from. A litre is not a cup size. It is a serving size that has been relabelled.
So when a search for a “1 litre steel cup” returns results, look carefully at what is being sold. Usually it is a glass-shaped tumbler whose litre is a brim-full measurement, a canteen vessel, or a jug with the word cup in the listing title. The dimension that makes a cup a cup — that you can raise it one-handed and drink without thinking — does not survive a litre.
Three different things people mean by it
The phrase covers at least three intents. The first is measurement: someone wants a steel vessel of known volume for the kitchen, in which case a marked jug is the right object and insulation is irrelevant. The second is serving: a litre vessel that sits on a table and fills smaller glasses. The third, and the most common, is a drinking vessel that happens to be large — someone who is tired of refilling a 300ml glass at a desk and wants to fill once.
Only the third intent has anything to do with drinkware, and for that intent the answer is not an open cup at all. An open litre vessel at a desk collects dust, loses temperature quickly, and spills when a cable catches it. What the third buyer actually wants is a lidded insulated tumbler of roughly that volume, which is a different product category with different numbers.
The nearest real thing is a 1.2 litre tumbler
HYV does not make a 1 litre cup. What it makes at that rough volume is the 1.2L insulated tumbler: the HydroPro 1.2L at ₹1,499 sits in that line. The HydroPop 1.2L is ₹1,699. These are lidded, so they resist dust and a knock, and they are vacuum-insulated, so a fill lasts.
Be precise about the retention, because this is where pages lie by copy-paste. A 1.2L tumbler is rated 12 hours cold and 8 hours hot. That is deliberately lower than the 24 and 12 a sealed 750ml-to-2L bottle gets, and the reason is geometry: a wide opening and a lid designed to be drunk through leaks heat in a way a narrow sealed neck does not. You are buying convenience and paying in hours.
Open steel loses heat fast, and that is physics
If you still want something open-topped, HYV's one open vessel is the OpenFlow 470ml at ₹999, and its published numbers are the proof of this section: 6 hours cold and 3 hours hot. It is still double-walled steel. The hours collapse anyway, because an open surface loses heat by evaporation and convection no matter how good the wall is.
Scale that reasoning up and you can see why a 1 litre open steel cup would be a poor insulated product even if someone made one: a litre of open surface area with a kilogram of thermal mass behind it, sitting in a 30°C room. It would be a nice object and a bad flask. Anyone quoting a 24-hour figure for an open cup is quoting a sealed bottle's number.
Where a plain steel cup still wins
Plenty of places, and it is worth conceding them. A single-wall steel cup is lighter, cheaper, nests with others, survives being sat on, and can be heated directly on a flame — which no vacuum-insulated vessel can. For a kitchen shelf, a trek where weight matters, a temple kitchen or a thali service, single-wall steel is correct and insulation is dead weight.
What a plain cup cannot do is hold temperature, and what a litre open cup cannot do is be drunk from comfortably. If either of those matters, you are shopping for a different object. HYV has no entry in the plain-cup category at all, and no handled steel mug at any capacity, so on that search the answer is simply that we are not the supplier.
Disclosure
HYV sells the tumblers named above, so read this as a manufacturer's argument rather than an impartial one. Here is something you can test without us: take any open steel cup you already own, fill it with hot water, and check it with a thermometer after three hours — the result will tell you more about open-top insulation than any listing. And here is what HYV is not: a source of plain single-wall steel cups, drinking glasses or steel mugs. Those are the right products for a kitchen shelf and we do not make them.
Related reading: steel cup vs insulated tumbler india, best insulated tumbler india and best 1 litre water bottle india.
Frequently Asked Questions
Does anyone make a 1 litre steel drinking cup?
Vessels sold under that description are usually serving or measuring vessels rather than drinking cups. A litre of water weighs about a kilogram, which is past the size most people can raise and drink from comfortably.
What does HYV make closest to a 1 litre cup?
A 1.2L insulated tumbler. The HydroPro 1.2L is ₹1,499. It is lidded and vacuum-insulated rather than open-topped.
How long does a 1.2L tumbler hold temperature?
12 hours cold and 8 hours hot. That is lower than a sealed bottle because a wide drinking opening loses heat that a narrow sealed neck does not.
Why do open steel cups lose temperature so fast?
An open surface loses heat by evaporation and convection regardless of the wall. HYV's open-topped OpenFlow 470ml is ₹999, and its rating is 6 hours cold and 3 hours hot.
Does HYV make a steel mug?
No. There is no handled steel mug in the range at any capacity, and no ceramic. The insulated tumbler formats are the alternative.
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