The Puffco Travel Clear Glass is back and gives the Peak and Peak Pro a new dimension. By twisting the mouthpiece, this patent-pending design allows you to lock in water. This eliminates the need to refill your device and keeps it ready to use at all times. The patent-pending closure system features two positions accessible simply by rotating the mouthpiece. The open position allows you to fill with water, inhale, empty water, and clean, whereas the closed position prevents any water from escaping during storage and transportation.