>>11730660okay so i'm thinking with you. I'd say download CES software (basically a database of materials). Look for materials with a high heat capacity (Cp) and a high (thermal) conductivity ?. Cp measured the amount of heat that it takes to make the temp of a material rise by a given amount. ? measures the rate heat flows through the material when one side is hot and the other cold.
heat flows from hot to cold, something will feel cold to you when its thermal conductivity is high, you lose heat fast trough the material, losing heat = cold. Think of it as heat being water and the material being a sponge or something. So next thing you want is for the material to be able to succ heat for as long as possible untill you have to cool it again, hence the high Cp. Buy the material and put it in the freezer. Let me know if you've found anything.. read up on how exactly thermal conductivity relates to coldness, maybe you want this to be at a medium or something, or the sameish as water. ? you definitively want to pump up to the max.
While text always sounds confident, I have no actual practical experience with picking/finding the right engineering materials, this literally week 1 materialscience theory.
