This 15piece food container set includes 12 borosilicate glass containers with 12 airtight lids in various sizes to meet different storage needs. The high-quality glass is durable and resistant to temperature changes. The smart snap-lock lids feature silicone seals to ensure leak-proof, airtight storage. The containers are food-grade, BPA-free, and safe for the microwave, freezer, dishwasher, and oven (up to 500°F)—with lids removed. Customer support is available for replacements or concerns.