SodaPup Unstoppables are the perfect solution when filling treat dispensers with messy moist ingredients. Get this 4-pack and make your enrichment easier! USE: Insert the Unstoppable into the small hole at the top or bottom of your SodaPup dog toy. Invert and place the toy on the unstoppable, using it as a stand. Fill the toy with your favorite recipe. Place toy on the stand in the freezer. Upon freezing, remove unstoppable from the toy before giving the toy to your dog. ONE SIZE FITS MOST: Unstoppables fit ALL SodaPup treat dispensers except XL Can Toys. SAFE: Our nylon material is FDA compliant and non-toxic. It is dishwasher, freezer and microwave safe. MADE IN USA: Proudly keeping jobs in America. Designed and manufactured in the USA! Care DISHWASHER SAFE: Easy to clean. Place in dishwasher or wash with warm soapy water. Warning This is not a chew toy. This is a small device that could represent a choking hazard to your dog and to young children.