Jacob looks at Charlie " how does the capsule not get disolved? "
Charlie smiles" well ravens are one of the few birds that can cough up non digestible things so bones,message capsules ect"
Jacob looks at him  in disbelief" show me"
Charlie shrugs "alright " he turns into a raven and eats a bottle cap then spits it back up and turns back into human form" see"
Jacob nods" cool"