the 4 in 1 principle for maximum benefit, prepare, serve, store, heat up, 100% hygienic thanks to high-quality borosilicate glass, particularly robust and cut-resistant, no odors, no discoloration in the glass container, 420°C oven-safe, with a stacking edge for easy stacking of the same size , 100% leak-proof, safe to store and transport, 100% flexible, glass container oven and dishwasher safe