All of our 6" (15cm) dia. columns have controllable bubbles, & all of them cycle slowly through a wide range of colours. This constantly changing swirl of colour can be halted with a switch attached to the hold socket. With a separate switch,  the user can pause, pulse or bump the bubbles.  

A strong tube made of acrylic, which is great because many people love to touch the cool tube surface and feel the deep vibrations.

Upgrade at any time to an Interactive Column by purchasing a colour controller, either wired or wireless.