Drive’s multi-threaded lid ensures a secure fit every-time, preventing leaks. Compatible with oxygen flow up to 15 LPM. Audible back pressure alarm activates at 6 psi. No aluminum fitting in stem. Soft plastic diffuser reduces clogging due to mineral build-up. Translucent jar provides improved visibility of jar contents. Bottle has a 500 ml water capacity. Finger grips at the top of the bottle, make the lid easier to screw on/off.