Retainer Case With Vent Holes and Hinged Lid Snaps (6) Go to amazon.com Related posts Best retainer case for 2022 Top retainers case FeatureWith Ventilation HolesTight Secure ClosurePatient Sticker information IncludedYou Will Get 6 Retainer Cases (Colors Vary) DescriptionStrong, durable and lightweight, protective heavy-gauge plastic storage boxes. Hinged lid snaps and stays locked.