This bubbler features a non-spill structure. You can conveniently fill the glass bubbler with water and turn upside-down. The water will not leak from the attachment. The Cloud V Aqua will allow you to vaporize even smoother, as the vapor filters through the water each time you inhale.       How to use:       Detach the Bubbler from the atomizer.     Turn around the Bubbler     Fill it with water.     Turn it around and immediately draw to trap the maximum amount of water.     Gently secure it back on the atomizer.