Stackable glass boxes with lids from French Pyrex Made of ultra-resistant borosilicate glass that can withstand both dishwasher and microwave. Thanks to the fact that the lid is 100% leak-free, these cans are perfect as a lunch box. On the upper side of the lid there is also a surface where you can write what the box contains. The forms can handle oven temperatures up to 300°C (no lid) and freezer temperatures down to -40°C. The glass does not absorb any smell or taste and also withstands sharp metal utensils without scratching.