The good news: We can recommend all the containers we tested. All the latches proved durable, as their seals proved to be airtight and leakproof. In other words, you can be sure that these OXO Smart Seal containers, no matter their size, will keep your food fresh with no mess.
And since these containers come in both rectangular and round shapes, we made some notes along the way detailing what we liked about each. We appreciated the rectangular-shaped containers for their efficient stackability, and liked how deep the larger round containers were, which added to their versatility. Another plus? Since they’re glass, they can function as serveware, going right from the oven to the table.
So, which should you buy? Your choices will depend on your storage needs. If you want multiple containers in different sizes we suggest buying a set; it's cheaper than buying individual containers. If you’re looking for a set of identical containers for meal prep, we suggest buying multiples in one of two sizes: either the 3.5-cup rectangle or the 4-cup round—both are roomy enough to hold a sandwich and a side, a grain bowl, a hearty amount of soup, or generous green salad. We’ve outlined potential uses for all the containers below.