Toy Cubby 5&rdquo; Colorful Test Tube Touchable Bubbles - 24 24 pieces Colorful Test Tube Touchable Bubbles. Bubbles is made with polymer, allows bubble to float in the air and also durable enough to last long even touching the bubbles with your hands. Test tube comes in different colors, great party favors for your themed party. Great giveaways, gifts, goody bags stuffers or anything you can think off. Catch or stack all the bubbles in your hands. Great for kids and adults, can be used indoor or outdoor.