Was doing this with food storage containers.

I looked above my fridge one day and saw about 40 tupperware lids that I had never used and would likely never use. I went through them, saving the large containers for large meals (think Thanksgiving leftovers) and some moderate sized containers for eating for the week. Everything else got tossed and I instead purchased two sets of food service containers. They accomplish the same goal, they're all the same size, and they don't take up nearly as much space.