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Features: 100% Brand New & High quality Color: Blue、Red、Purple、Yellow、Green Type:novetly toy Material: Plastic Size:290*55mm Watch your vortex spin in the bottle!!!This is a great educational and fun experiment and activity for school classes, homeschoolers, scouts and any other group. Create a tornado from two liter plastic bottles, water and a colorful plastic connecting tube. Swirling water creates a funnel-shaped vortex as it drains from one bottle to another. You can create different ways to work with it by timing the water draining, using bits of paper or food coloring or lamp oil. Attention: 1. There might be slightly difference in color, because of the computer monitor settings. 2. With the difference in the measurement method, please allow 1cm in size deviation (1cm=0.39 inch).Thank you for understanding!! Package includes:1 x Cyclone Tube (plastic bottle included) Welcome to willbesugar.th ☛We set up a big sales coupon to buy more and save more ☛Business category: family kitchen and bathroom / Pet Products / gardening / daily necessities ☛Shipping time: we are from China, usually need 5 to 10 days, please wait for your package patiently ☛After sales service: if you have any questions, please contact us as soon as possible, do not give bad comments, thank you for your cooperation, I wish you a happy shopping!