Durable, water-tight, and perfect for kids, it’s no wonder you can find Baby Soda Bottles in classrooms around the world. Unlike ordinary, breakable glass test tubes, you’ll rarely find yourself replacing these thick-walled plastic test tubes. Baby Soda Bottles can be dropped, stepped-on, or thrown and they just won’t break! Recommended for children ages 3 and up. In addition to being some of the sturdiest test tubes ever, Baby Soda Bottles are leak-proof and feature caps that easily twist on and off, making the test tubes shakable and unbreakable, even with liquids inside! Why are they called Baby Soda Bottles? Over the years, Steve Spangler coined the name Baby Soda Bottle (BSB) for this test tube looking container because its home is actually in the bottling industry. At the bottling plant, the blanks or preforms (tubes) are placed into a vacuum mold and heated so they soften. Hot air is then blown into the tube, stretching the warmed plastic to 40 times its original size to become a 2-liter soda bottle. When the plastic cools into the shape of the mold, the bottle is ready to fill with your favorite refreshing drink. What’s Included? Test tubes with twist-on caps, activity guide with over 10 project ideas. Available in quantities of 15, 30, 60, and 120. What Does It Teach? Baby Soda Bottles will instantly become a staple of your classroom or household, no matter what your scientists’ ages. The thick plastic material is nearly unbreakable and makes the perfect closable container for all kinds of materials. Grow plants, observe critters, collect water samples, explore different densities, hydrate polymer crystals, and mix all the colors you can find in a rainbow. We put some baby soda bottles through very rigorous testing including dishwashing, dropping, and stomping on and they were unharmed. It is not flame proof and does melt under extreme heat.