water bottle humidifier for oxygen concentrator oxygen bottle includes a pressure relief valve and downspout diffuser, ensuring a high flow delivery of 6 lpm humidifier bottle designed to work with oxygen concentrators to decrease drying out of the upper respiratory tract, during long term oxygen use. Adaptable – water bottle humidifier attaches easily to most oxygen concentrator. Maintains desired oxygen saturation – bubble humidifier is specifically made to deliver high oxygen flow rates via face mask. Soft-start – water bottle humidifier is easy to use and clean. Adapter for connecting oxygen concentrator to humidifier - one end of the adapter slips over the nipple port on the concentrator. The other end threads into the attachment site on the humidifier bottle.