Solid Valve Liquid Chamber is especially designed for liquids and oils. The Liquid chamber is for use with the Volcano Classic and Volcano Digit vaporizers. For most efficient use with liquids it is recommended that the chamber should be filled with a ¼ to ½ a teaspoon of liquid. The liquid pads are designed to act like the vegetable fibres of herbs. It provides the perfect surface so that the flavour and active ingredients can be vaporized efficiently.