The first elastic box cover, the capacity is enlarged by 50%, it is an excellent combination of fresh-keeping box + plastic wrap, and the transparent appearance is super versatile!! The elastic cover is pressure tested and qualified to withstand a 100 mm tensile puncture resistance. [Magic Lid] The film is made of Japanese liquid silicone, it's only 0.6mm thick, it rebounds and doesn't wash for a second, It is actually the most transparent silicone on the market! Very flexible, can increase the volume by 50%! No need to worry about whether the food can be put into the food box. It is a high-grade material with high quality and high transparency, and it is the best material that is safe for contact with food.