The basics Maekup's Foaming Mouth Powder is formulated using food grade ingredients that are safe to use directly inside the mouth. The benefits Perfect for rabid type character effects. The uses Once the powder comes into contact with saliva/wet it produces a foam perfect for recreating convulsing effects on zombies, monsters, etc. The bottom line Can be used inside empty gelatine capsules and bitten open at specific times if required to foam on demand.