Last Easter when our family was here, I was preparing an oven proof bowl for warming up a dish. From the fridge I took out a small zip-lock bag that had several unsalted butter wrappers, folded neatly. I used one to butter the bowl prior to adding the food. My daughter-in-law noticed what I was doing and was excited to see a new kitchen trick. I told her I save all the butter wrappers to use in muffin tins, baking dishes, and potato skins prior to baking, and so on. Why throw out the wrapper with a little bit of butter remaining when you take out the stick, especially if you have brought the butter to room temperature, which I often do, because I keep my butter frozen.
I wash all my plastic storage bags in hot soapy water, hang them to dry on a special gadget made for RV's to dry small, hand washed items in the shower. I also do this with Food Saver bags. Hence, it is rare that I buy any food storage bags of any kind.
So, what unusual kitchen helpers do you have?