Zumoe has designed and manufactured a fun, cute, new way to hold your mouth guard, retainer, invisalign, mouthpiece or night guard. There are 50 designs by Zumoe, some for specific sports like lacrosse, soccer, field hockey, martial arts, football, basketball and some designs for general or other sports. There are designs for everyone, cute, fun, attitude or blings. These cases are also great for holding jewelry while you play a sport if you do not use a mouthguard. another use is for kids to use in your lunch bag so your retainer does not get thrown out at the end of lunch. Hope you become a Zumoe user and tell your friends about this great way to strap your mouthguard onto your sports bag, purse, lunchbox or book bag with the Carabiner and ID tag for your personal information. Cases designed to open and close upwards of 10,000+. Stickers sealed with water resistant coating.