Joie's Silicone Stretch Lids stretch to create a snug, airtight seal on food containers to reduce food waste. They're reusable and more airtight and economical than using food storage bags, cling wrap or aluminum foil. Food properly stored in airtight containers, like bowls with lids and other containers with lids, stays fresher longer for less food waste, both in the fridge and pantry. Joie?s Silicone Stretch Lids quickly turn bowls and other food storage containers into airtight kitchen storage. This set includes (1 each) 3-inch, 5-inch, and 6.75-inch flexible lids to seal most storage containers. Their deeper edge helps create a secure seal.