TecUnite 8 Pieces Bottle Connectors Tornado Connector Cyclone Tube for Scientific Experiment and Test, 5 Colors

TecUnite 8 pieces bottle connectors tornado connector cyclone tube for scientific experiment and test, 5 colors

Educational experimental supplies:
Good educational and fun experiment and activity for school classes, homeschoolers, scouts and any other group, stimulating kids interest to physics and study.
Apply the tool to connect 2 bottles with approx. one third water, then shake them for 4 to 5 times in horizontal direction, and you will see your vortex spin in the bottle.

Specifications:
Length: 4.8 cm/ 1.89 inches
Outer diameter: 3.3 cm/ 1.3 inches
Inner diameter: approx. 2.8 cm/ 1.1 inches
Material: plastic
Color: red, green, blue, yellow and purple
Quantity: 8 pieces

Package includes:
8 x Tornado connectors

Note:
You have to take the food-security ring off of your bottles to get these to catch the threads.