Extreme Bubbles WhatABubble Giant Bubble Concentrate Refills Total, 1.5 gallon Refill pack of world famous WhatABubble Giant Bubble Mix. Each 4 fl oz bottle of concentrate needs to be diluted with water. &nbsp;Makes one quart. Amazingly strong robust bubble solution. &nbsp;These bubbles can bounce on water. Bubbles have beautiful colors too. Made in Minneapolis, Minnesota USA.