1. Thickened kraft paper--use food grade paper, which is safer to use
2. Stiff and not easy to collapse -- strong bearing capacity, thickened paper to enhance compression resistance, not easy to break
3. The inner wall is coated to prevent leakage
4. The bowl mouth is flat and edging -- the three-dimensional buckle design on the edge is more suitable for the bowl mouth and has good sealing performance
5. It can be heated by microwave and can be refrigerated