Kesywale Tornado in A Bottle, 10Pcs Tornado Bottle Tube Connector Plastic Water Vortex Maker Cyclone Tube for Scientific Experiment and Test, 5 Colors (Random)

Not what intended for but, I drilled out the center to make the hole bigger and use these to transfer shampoo and conditioner. If not drilled out the center hole is too small for a thicker substance to flow through. If a soda bottle cap threads onto your bottle this should fit. Works well for what I needed.

They work but a could leaked. May have been the type of bottle used.

Not the best or the worst. They do the job.

Perfect for kids especially those that love science and tornados like my little guy. The tornado tube fits right on a 2 liter bottle. Easy to connect the bottles. No more duck tape or having to retape cause the water is leaking out. 10 in a pack so it works out if you lose a couple. Different color tubes is helpful too, helps when splitting between little friends or siblings. Also a good sensory toy that doesn't break the bank.

My son used theses for his science far project. They worked great!

fun and easy to use but the fit on a pop bottle seems just slightly off. even after pulling the pop cap ring these do not tighten down all the way. Its like the threaded end needs to be a little shorter so they can thread tight onto the bottle a little more. The flared ring stop on the bottles gets in the way and prevents the device from going on far enough to get a good seal. Works well just don't squeeze the bottles.

These are amazing for tornadoes in a bottle. So easy to use. And so fun to watch

I bought these for use in my classroom. We made bottle tornadoes with water and glitter. The kids liked them so much we left two assembled on the back counter of the room and after several months of use have held up to the destructive powers possessed by middle schoolers.

Grandkids loved these items. Very educational. Thank you for a great product and service.