(Melting ice.)
Ear Plugs, Examples of Strengthening an Item on Shabbos, Hairspray, Stretching Shoes, etc.
open and closed metal cans, e.g. tuna fish cans, sardine cans, etc. Part 1;
Important Guidelines for Dealing with Lice or Nits on Shabbos, and What to Do if One Finds a Badly Wounded Animal;