BOROSILICATE GLASS - The highest quality type of tempered glass cookware available. 450F 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.