BOROSILICATE GLASS - The highest quality type of tempered glass cookware available 750F max temp LEAKPROOF & AIRTIGHT - Convex edge containers with tight snap locking lids give an airtight seal QUALITY PACKAGING - Individually bubble wrapped containers shipped in a 5 ply export carton MICROWAVEABLE DISHWASHER OVEN FREEZER SAFE - Easy cleaning & reusable - Great holiday gift BPA FREE - Safe to heat and store food in won’t affect taste or smell of food