RUTLAND Creosote Remover Toss-In Canisters are provided in an easy-to-use 3-pack box to prevent creosote buildup in chimneys Just toss a canister into the fire once per week to turn sticky, tar-like creosote to brushable ash and prevent further buildup from occurring No measuring and no mess. Canisters safely burn to ash in a fire Three 3 oz Toss-In Canisters Indoor use only