TecUnite 12 Pieces Bottle Connectors Tornado Connector Cyclone Tube for Scientific Experiment and Test, 5 Colors

TecUnite 12 pieces bottle connectors tornado connector cyclone tube for scientific experiment and test, 5 colors

Features：
Educational experimental supplies:
Good educational and fun experiment and activity for school classes, home school, scouts and any other group, stimulating kids interest to physics and study.

How to use:
Apply the tool to connect 2 bottles with approx. one third water.
Shake them for 4 to 5 times in horizontal direction.
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, purple
Quantity: 12 pieces

Package includes:
12 x Tornado connectors

Note:
You have to take the food-security ring off of your bottles to get these to catch the threads.
2 Liter soda bottles or other 2 liter bottles are suitable to use.