This set comes with two glass containers, each with a lid and a matching sauce container. I was immediately impressed by how solid and durable they look and feel. The glass is thick and well-made, unlike the thin, fragile bottles you sometimes get. There is a bit of weight to them, which feels appropriate for glass and adds to the sense of quality. I tested them by turning them upside down and shaking them; they are completely leakproof. The wide opening at the top is a big plus because it makes filling, emptying, and washing the containers very easy. I also like that the sauce cup has two separate sections, which is a thoughtful design detail. Beyond meal prep, I can see myself using these for storing salads, pickled radish, pomegranate seeds, and other small foods. Overall, these are very practical, well-made containers and a great value for the money.