These containers are heavy duty and user-friendly for filling and pouring. They have a 63 mm angled front opening for filling of ready-to-use chemical concentrates and a 38 mm top vent opening that accepts standard 3/4” tubing. It comes with a faucet for dispensing with a 38 mm cap. The spout will fit into the neck of 28mm bottle necks for easy not spill dispensing. Container has 1/2 gallon embossed graduations on top and front. FDA compliant.