not sure but i think styrofoam or thermocol
Closed-cell foam insulation is known to be the best at keeping water cold the longest. It has a high thermal resistance, preventing heat transfer and maintaining the temperature of the water inside for an extended period of time.
Stainless Steal
A metal bowl keeps ice cream frozen the longest.
When looking for a dog water bowl that keeps water cold, consider features like insulation, a double-wall design, or a built-in cooling mechanism. These features can help maintain the water temperature and keep it cool for your pet.
No, paper will not keep water cold for the longest time. A metal cup will keep water the same temperature for the longest time. I know this because I did a science experiment about this but instead of cold water I used hot, which won't really make a difference. The next would be glass then paper.
Ice..
It keeps the air trapped in side and has to layers with air as insulation in the middle
no,cold wated keeps your skin refreshed its keeps your skin from getting dry
no !
poly venal chloride
So it doesn't freeze.
Type your answer here... The water is too cold.