I use tuna can tins. They make great one serving portions, are excellent for making homemade burger buns(the large version)or dinner rolls(or kid's sized burger buns). The also make very pretty small cup "cakes". They are excellent for making one serving casserole dishes(and go from freezer to oven no issues). They make lovely sized muffins, and oh such a nice serving of quick bread for a lovely tea. I also like the fact that they make a nice sized quick bread that can be sliced in half horizontally and dipped in egg for French Toast...oh pure heaven!
They are expendable, replacable and tossable. The list for their uses is endless...
"The only thing I am giving up today is...giving up!"