The Humidifier Bottle from Roscoe is designed for long term use and reliable performance. Sized at 350 cc, this bottle is ideal for use with all oxygen sources including concentrators, liquid oxygen, oxygen tanks and wall outlets. The large, easy-to-grip quad wing nut connector assures a secure connection to the oxygen supply source. Normally the unit offers quiet operation, but an audible pressure-relief alarm activates at 6 psi while the soft diffuser resists clogging due to mineral build-up. The translucent jar is permanently etched in large print, so the minimum and maximum water level markings are easy to read. This is one case of bottles and there are 50 bottles in each case. The easy-on/easy-off lid provides a positive seal, so no gasket is required. The soft plastic diffuser provides improved hydration and less system back pressure. The large print minimum and maximum markings indicating water level will not rub or wash off. The bottle is disposable and intended for single patient use only. Roscoe bottles are Latex-free.