Size: 5 Pack - 34oz . While other food storage containers have leaky lids & chip easily, Prep Naturals glass food storage containers are made of durable, high - quality glass & use smartestlock locking lid technology, locking food in with an airtight seal for secure, leak-free storage.Take the hassle out of meal prep and portion control.. Our 3-compartment portion control containers – the only ones on the market – are ideal for precise portioning, so you can put your meal plan into action.No more stressing about what to cook for dinner