Engineered for aggressive chewers in mind. Tiny flavor cells are molded into both sides of the Flavorit™ bone so you can fill it with peanut butter, cheese, cream cheese, or any other spreadable treat your dog prefers. The tiny flavor cells hold just enough spread to lure your dog to chew, but not so much that they're getting so many calories. You can even add different spreadable treats on each side to up the flavors! No mess because it’s concave design. Once your dog is done chewing, just run it through the top rack of the dishwasher for a thorough cleaning and it's ready for the next round of chewing. Or you can use a brush to clean up the leftover food. Even though it works great with all kinds of spreads, dogs love it on its own too! The Berry Flavorit™ bone is infused with human-grade berry flavoring. Flavorit™ is generously flavored you can literally smell the goodness of berries even inside the packaging! The result is a delicious-smelling and drool-worthy bone your dog will love even without any spread! Giving your dog non-edible bones also massages their gums and provides scraping action on their teeth, much like a dental hygienist descaling the plaque from human teeth.