Customer service - please, if you have any questions or issues regarding the fullstar food storage containers please do not hesitate to send the seller a message through Amazon we will respond within 24 hours. Plastic contains no bpa, phthalates or other toxins to leach into food. Fullstar Containers are refrigerator, freezer, microwave safe (base only, not lid, under 5 min, under 700 Watt,*for at least half-full container). Fullstar food storage containers make efficient use of every inch of your home kitchen because they are stackable and nesting. 10 sizes fulfill all your storage needs. Includes (2) 33.8 oz rectangular containers; (3) 28.4 Oz rectangular containers; (2) 23.6 Oz round containers; (2) 18.5 Oz rectangular containers; (3) 11.8 Oz rectangular containers; (1) 10.8 Oz rectangular container; (1) 10.1 Oz round container; (1) 8.1 Oz rectangular container; (1) 8.1 Oz round container; (4) 1.2 Oz dressing cups. Leakproof 4-hinge locking system forms an airtight, watertight seal between container and lid. Never endure spilled food in your lunch bag again. Translucent design allows easy identification of contents. 40 piece set includes 20 containers with 20 lids. Store and transport entrees and soups confidently with our revolutionary snap-lock containers. Also great for small arts and crafts supplies like beads.