... Water pump Use two D size battery,can replace water dispenser,good for travle Battery Water pumpEWP-001 Description: 1.Material ... used with 5 gallons water bottle,(can be adjusted to 3 gallon bottle)Neck Dia. of the bottle: 56mm(standard), 58mm Why ... operated. (2*LR20,D Size) ***2.No drips or leakage. 3.Great for the shed, cabin, camping, etc. 4.Dust-proof ...