Recommended to people who's new aligners can not fit tightly and correctly, get these help your aligner 'sit' better and helps orthodontic treatment progress more predictably. Four Flavors Choice - No flavored(white), mint scented(green), grape scented(purple), strawberry scented(pink). Safe Material - The aligner chewies are made of soft high quailty silicone material, without BPA, safe and last a long time. 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. Can apply firm pressure on a specific tooth like Molars area, Incisor area,Canines area. Best Chewies for Aligners - Aligner chewies help your trays fit correctly, relief pain from wearing aligners, clear aligner trays, effective prevention of deformities caused by braces.