Confusing website, confusing packaging, confusing instructions. published 2 years ago. Be very careful when choosing a signature mouthguard. To help you find the best youth mouth guard, we made a list of the best A Snake Eyes, Carnivore, or Pink Mamba mouth guard from Century solves thisShock Doctor, the #1 Mouthguard in the World™, leads the way in delivering groundbreaking protection and incredible Century Adult Mamba Mouthguard. Shop Youth Mouthguards at DICK'S Sporting Goods. If you find a lower price on Youth Mouthguards somewhere else, we'll match it with our Best Price 1. Place mouthguard over upper teeth to test for size. 2. · 5. Add the mouthguard to the mug or bowl for one (1) minute, submerging completely. (Strap will