Lightweight, stackable and durable, these 18/8 304 stainless steel 1-cup containers are oven, freezer and dishwasher safe and excellent for meal prep and food storage by themselves, especially for snacking with little ones, mixing dressings or sauces and baking desserts. Designed to do more, the containers also make the Adventure and Explorer Series ever more versatile to keep a variety of different foods separated on the inside.