I love these cute little cups. I use them for so many different things in my home. I originally bought them to travel with to put single servings of my daughter's formula in them so that I didn't have to carry the can around with me. I soon began using them for many things around my house. They are great for storing left over glitter, beads, buttons - any small items from a home project. The lid snaps on pretty tight so I do not have to worry about the lit popping off on its own. I can put on of these in my purse filled with formula and it will not bust open. In the months I have been using these I have never once had these break or open on me. They are made out of a pretty sturdy plastic. They are excellent for packing on a small picnic to store condiments in so you aren't taking the entire bottle of ketchup. I have my own business that I run from home and I cannot tell you how many times I have grabbed a handful of these things to work with in my studio. They have literally thousands of uses I would never be able to name them all here.