Costco oil can pump adapter

thingiverse

This is an adapter to allow use of a water pump to extract oil from the 16 liter oil jugs sold at Costco. I used the pump sold on amazon called the "Rabbitstorm Water Bottle Dispenser USB Charging Portable Electric Water Pump for 5 Gallon Bottle". Once you have printed this, all you need to do it cut a hole in the cap of the oil bottle and attach the cap into the bottom of the adapter. There are ribs inside which allow the cap to fit snugly. The pump simply drop on top of the adapter and is ready to go.