A: Instant cold packs are made out of ammonium nitrate or calcium ammonium nitrate and a small pouch of water in a plastic pack/bag, when the pack is crushed by hand the two mix and an endothermic reaction occurs and voila, you have a cold pack for about 20-30mins. If you're wondering, yes you can take these on planes.
A: Hi A - I appreciate your interest in this set of cold packs. These cold packs are made from plastic. Thanks for reaching out! - Chris
A: Hey Libby ! That's a good question. Well, there is a slight condensation that can form.This is all dependent on the outside temperature. Thanks - Hafsa
A: Hi Cindi - These cold packs are perfect for on the go use or travel. Each cold pack weighs approximately 0.5 lbs. Happy traveling! - Katrina
A: Hi ScreenName - Good Question. These instant cold packs, perfect for on-the-go use and travel first aid kits, last about 20-30 minutes. Be sure to check out the reviews for more helpful information. We hope this fits your needs. - Alex
A: Hi Fred T - That's a great question! We'd recommend disposing the cold pack in the trash. Hope this helps! - Patricia
A: Hi Miles - What a great addition to your first aid kit! These cold packs are disposable/single use. I hope these are what you're looking for! - Katrina