Fresh Knight Retainer Case (2 Pack). Retainer Case With Vent Holes. Perfect Denture Case, Mouth Guard Case, Aligner Case, Mouth Guard Case, Retainer Cases (Bright Pink)SUPER EASY TO cLEAN: lets be real, who wants to hand wash anything these days This retainer case can be thrown in the top rack of your dishwasher for easy cleaning Or do it the ol fa..