Tornado Bottle Connectors Cyclone, Plastic Tornado Connector Vortex Bottle Connectors for Students Scientific Experiment Test (5PC)

These were perfect for my son in law and grandkids to experiment with making tornadoes in a bottle. They fit several different bottles and we all had fun watching.

These are great! My husband and son had a great time making a bottle tornado!

So many come in a pack, these are fun for learning and they lasted really well.

They leak but not too bad. My son was able to set them up and use them a while.

Used for shampoo bottles. The thread is different than most shampoo bottles but these are so cheap I couldn't resist. And low and behold they actually work good enough to mount a nearly empty shampoo bottle to the top of a new one to transfer the reamaining contents. It leaks a little but nothing to worry about. If you are cheap these are for you.

Why did you pick this product vs others?:These were great to make “tornados” with having 2-Liter bottles attached. I can’t say I had any leakage whatsoever, but then again I’ve done this before when I was a kid and I remember my father using plumber’s/teflon tape on the bottle threads prior to connecting them together with these connectors. I did the same thing with the tape over the threads this time with my own kids when installing these connectors to the water bottles and therefore didn’t experience any leakages. Kids loved it, and therefore I loved it.

I see a few reviews that say these leak. You have to take the little spike ring off the bottle for it to seat all the way down, then it won't leak at all. I drilled out the hole in the center so I could use half a soda bottle as a funnel to fill other soda bottles and these work great for that. Fits anything with a standard soda bottle thread.

Made tornados with my kids for preschool and they loved it! It was fun for kids and value for money was great. The size and fit for them was a little big but I helped hold the bottles and it made it easy.