ice
Keep in the refrigerator or if u want it REALLY cold try freezing it
Hot water pipes are made of different material so that they can keep the water flowing through them at a hotter temperature. Hot water pipes are usually made of copper or some other heat conductive material, and cold pipes are usually made of plastic or other non conductive material.
The best material to make socks out of to keep feet warm in cold weather is wool. Wool is very thick and that makes it possible for it to hold in the body heat and keep the cold out.
Metalic cups keeps the water cold and it can be also used to keep the water hot .
They are commonly made of a neoprene material or a neoprene and rubber material and are made specifically for triathlon events .They will keep you warm when swimming in cold water.
No however it depends on the material. Picture your clothes soaked in water. Obviously they sink but it would not stop you from sinking really.
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.
A coat is a clothing material that you wear outside on cold days to protect your body from the cold and keep you warm
Ice..
The water would have to be colder than the ice to keep it cold. That is not possible unless it is brine(salt water). Then ice at 32f could be cooled by brine at say 30f.
well not really because fish cant do that but yes only for a little bit
put them in cold water