Pwshymi Retainer Box,12 Pcs Denture Box Plastic Tooth Dental Orthodontic Retainer Compact Storage Case Material: The case is made of plastic material, which makes the retainer case odorless. And it is also wear resistant and not easy to crack, which also leads to a longer service life of the box. Wide Application: The box is very compact and lightweight, so these retainer cases are very convenient to carry. The box is suitable for storing most fixtures, orthodontics, dentures, earplugs and other small objects. Dry and Breathable: 4 small holes are designed on the upper side of the retainer case, so that it can dry easily, and it is not easy to breed dirt, it is more and hygienic during use.