Oopsu 10PCS Vortex Bottle Connectors, Tornado in A Bottle for Students or Other Children

Works great!Add a little teflon tape and no leaks.

The connectors leaked immediately and did not even hold onto the bottles, almost as if the thread was not correct for soda bottles. Should have known better by cheap price. I bought a single connector last year for $18, that we eventually lost. Now I know why. You get what you pay for.

These work very well! my son LOVES THEM!!! I docked a star because they leak a bit. The bottle would also pop iff if my son was too violent with them. I suggest paying attention to the quality of the bottles. I would suggest using some plumbers tape on the threads to help prevent this. We added some food coloring and glitter to the water to make the tornado a bit more visible.I bought these for home use, but I didn't need 10. I gave a few away as birthday gifts and I gave some to my son's daycare class. They were so happy to have them and the kids have enjoyed it.

These were used as party favors for a birthday party. Not sure how well they worked but they arrived quickly

These are a great idea, but are a little iffy. Knowing that they will be attached to soda bottles, you'd think there would be a nice tight seal, but there isn't. I used these in a science camp & about 50% of the kids had leaky bottles. It was easy enough to fix with some electrical tape, but not nearly as nice to look at. I also saw someone say a washer put in the connector before attaching would fix the problem, but I wasn't able to test that. Overall, I was happy with the product because we got to make some cool tornado bottles & the kids were happy, just wish they fit a little better.

Was so excited to do this with my son for his bday. Unfortunately they barely thread on the sprite bottles we tried. :( they pop off and dump water all over the floor. Not very kid friendly. :(

A little leaky. Not too bad.

The connectors work very well. All issues of leaking were resolved by using this product. I would recommend them to anyone wanting to do the tornado in a bottle.