Get more bubbles for a longer period of time, and give your machine a longer life., without the buildup of grime! The Bubble Max Auto-Fill is a revolutionary new product in the bubble machine industry. Not only can your continuously produce bubbles for days, weeks or months (depending on use) without the labor of having to fill every few hours, but the machine is self-cleansing! With a flip of the switchthe machine cleans itself. Just add warm water and the unit will pump it through the tank, and over the wands, keeping your machine clean and fresh for the next show. Be sure you ask for BubbleMax Auto-Fill for the easiest and cleanest way to make bubbles on the planet!