Crystal-clear "Tritan" lid with removable silicone gasket for easy cleaning and improved hygiene. The Borosilicate glass is shatterproof. 4 latches with hinges ensure a longer life for your food. The container is 100% airtight. Food safe, BPA free, freezer safe, fridge safe, oven safe (without lid), microwave safe (with loose lid), dishwasher safe Without lids, the glass containers are nestable for compact storage when not in use. Designed by Zyliss in Switzerland 5 year Zyliss guarantee