We tested it,
so you don’t have to.
Two glasses. The same drink, the same room, the same starting point. One aaurvann, one ordinary glass. A camera, a timer, and no edits until the difference was impossible to miss.
Ice that holds.
Equal amounts of water and ice in both glasses, poured at the same moment and left in the same room at the same temperature. A timer ran in frame throughout.
At one hour and seven minutes the ordinary glass held nothing but water. The aaurvann still had ice in it.
Iced coffee and drinks that are not watered down.Coffee that stays hot.
How we did it
The same drink at the same starting temperature in both glasses, left untouched in the same room, with the temperature logged as it fell.
Why it works
Two walls with a sealed air gap between them. Air is a poor conductor of heat, which is exactly the point: the drink keeps its temperature and the outside stays comfortable to hold.
Want to see it up close?
If you serve in a café, hotel or restaurant, get in touch and we will come back with a proposal that fits your volume. If you simply want one for yourself, it is on Amazon.
Our own measurements, carried out on the aaurvann 250 ml double-walled glass against a single-walled glass of the same volume. The cold test was measured as the time until the ice had melted completely at room temperature and is documented on film above. Results vary with room temperature, ice size and how much the glass is handled.