Also available as a pack of 50, SKU - BOL-CS-UBBS-P. World Centric compostable clear lids for small takeout burrito bowls are made from PLA, (polymer made from plants). Great for warm or cold items, these lids are heat resistant up to 110 deg F. 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.