KONG STUFF'N Real KONG Real Peanut Butter uses a formula that is virtually identical to peanut butter brands commonly found on grocery store shelves All natural ingredients include roasted peanuts, sugar, hydrogenated vegetable oil to prevent separation and salt contains zero trans fat per serving Recommended for use with all KONG Classic and KONG Extreme dog toys Simply insert the filling nozzle into the large hole of the KONG toy and squeeze