Made of food-grade high borosilicate glass, BPA-free, lead-free, non-toxic, freezable and resistant to corrosion. This glass storage jars can withstand temperature -4? to 302?, specially designed for your kitchen. The sleek see-through design allows you to see all your food at a glance and know which ones need refilling. The Emica Home glass kitchen canisters were designed square and stackable to save space, so you could fit them into your cabinet, refrigerator, pantry or cupboard easily.