With its protruding handle that promotes a comfortable grip for pouring as well as stability in stacking, and its shape especially suited to withstand even light weights, the lOL Supertank AdBLue model canister is the ideal canister for containing and transporting AdBlue. In order to facilitate the emptying operation, an extendable decanter with a nozzle adapted to the filling hole of the AdBlue tank is provided separately and lying down. The plastic material used, together with the gusset profile, makes the decanter easy to roll up and insert into the side recess of the canister. The decanter, once extracted from the canister socket, easily engages the Din51 neck thanks to a truncated coupling that allows decanting without liquid leakage.