Comes with 12 borosilicate glass containers in 3 sizes and shapes along with 12 airtight lids to keep food fresh Made from durable borosilicate glass that is microwave, oven, freezer and dishwasher safe Airtight lids with silicone seal lock in freshness and prevent leaks, spills and odors Stackable containers save space; lids fit securely and removable silicone ring is easy to clean Backed by FAWLES with free replacements for any defective or damaged pieces