Soothe an insect bite or numb a mild burn without freezing your fingertips by using ice frozen in a film canister. Wash canister with soap and water beforehand, fill with water (allowing room for its expansion), cover, and freeze. To use, run cool water over the canister, then uncap, and gently squeeze to loosen the ice.
this is a good idea but do they still sell film.
Cute idea :) but It is *never* a good idea to directly apply ice to a burn, no matter how mild.