Unique Y-handle Designed - Easy to hold and will not fly out of your mouth like the cylindrical chewies, avoid choking hazard espeically for children. Premium Material: Aligner chewies are made of edible grade silicon with moderate hardness, 100% BPA-Free, durable and reusable, easy to clean and can be applied for a long time Aligner chewies help your trays fit correctly, relief pain from wearing aligners, clear aligner trays, effective prevention of deformities caused by braces Safe and Easy to Carry: Each retainer chew is individual packaged, vacuum and sealed, safe and hygiene. Lightweight and portable, which can be easily stored in your retainer case Apply firm pressure on a specific tooth like Molars area, Incisor area,Canines area LA MIERE Aligner Chewies,Food Grade Silicone 1PCS Y-Shaped Chewies for Invialign Aligner, Orthodontic Munchies Chompers Aligner Trays Seaters Chewies, Black