[elnate]

Resealable sandwich bags. I use them to portion food, either raw or cooked, and freeze. It means even if I'm working 50+ hours this week I can cook a couple of meals on Sunday and be sorted for the week. It also means that, since I live communally but cook by myself, I don't have to eat the same meal for four days in a row.

[philip1209]

I use ball jars. They are reusable, they basically never spill during transit, and they fulfill multiple other roles.