I have also used my bear can as a washing machine. Temporarily take out the food, put in clothes and solar warmed water (I do not use soap), and kick it around for about half an hour.

I tried to use the clear plastic bear can (Bear Vault) to solar bake biscuits. They did rise a bit and get a bit baked but not browned. Not very successful. I have yet to try it in my Bearikade, which is black. It actually may heat up more than the Bear Vault.

You have to put the food you took out somewhere. So do not try this if there is a serious threat of a bear coming into camp. And keep and eye on your food.