Abstract: An easy-fill water bottle system features a water bottle. A bottle first end features a tapering hollow neck with a neck aperture and a bottle second end features a cylindrical channel with a first shoulder located close to a channel midpoint and a second shoulder located close to a channel second end. The channel features threads from the channel midpoint to a channel first end. The system features a flush cylindrical lid having a first lid shoulder located close to a lid midpoint and a second lid shoulder located close to a lid second end. The lid features threads located from the lid midpoint to a lid first end. The lid second end features a plurality of indentions. The system features a water dispenser adapted to receive and fluidly connect to the bottle first end.