i used large ziplock bags for storing clothes. just a thin layer of the gel inside and i have many cheap, large cooling ‘blankets’ that i literally wrap around my feet and legs during the night
i don’t store them in the freezer.// they feel cool enough as is. also nice to fold behind the neck!
i shiver down my back and arms when i sleep… so my core is wrapped in heating blankets … and the rest of me is wrapped in my jumbo gel packs!