A canister is a glass tube with swirling green essence inside of it. It can be absorbed simply by putting your hands on top of it. While known for being painful during the absorbtion, afterwards it grants the user new abilities such as shaping or spells. Any creation or being could use it, causing it to be forbidden, outlawed, and destroyed by Shapers . The rebels , especially drakons , favor canisters as it allows strong abilities to be learned in just a few moments whereas learning it would take years to perfect. It is small and easily transportable, being small enough to fit several on a cart.