Also available as a pack of 50, SKU - SBL-CS-32-P. Fits SB-CS-24/32/48 clear salad bowls. World Centric compostable clear dome lids for 24-48 oz salad bowls are made from PLA (polymer made from plants). They are suitable for cold foods, freezer safe. Not microwavable. PLA products should be stored in a cool place below 110 deg F and out of direct sunlight. These are certified compostable in a commercial facility, which may not exist in your area.