Plastic Screw Caps for PET Bottle, 28mm, bag of 24

As long as you find the right bottle for these they work great. I'll assume a lot of us are looking at these to sneak booze into an event instead of paying high prices inside. We had no leaks and everything worked out great. A word of caution, when filling your bottle don't attempt to get it completely full, it does stand out. Try to leave that 1 inch gap like most other bottles have! Enjoy my friends, will be buying again!

Great buy, purchased to bring wine into a outdoor event. Does not fit 16oz bottles. Go for the larger 2 liter bottles. Screw on without any issues and did not leak. Definitely was a hit with my friends, and I even gave a few away. Would definitely recommend if you are going to an event outdoors where you are not allowed to bring alcohol.

These are great if you can find the right bottle. I got an Aquafina one as suggested for a concert, but these caps were just barely too tall (couldn't tighten it more due to that ledge below the cap) so it leaked a tiny bit. I was able to make it work by keeping it upright and not shaking it too much. Later I found the prefect bottles - Simple Truth Artesian water (e.g. Fred Meyer or Kroger brand) - which I used for a 3-day music festival with no issues. I would suggest using one of the caps to find a bottle that will work best.

Worked great

We used these to sneak white rum and vodka onto a cruise ship successfully! The security even did a shake test and was satisfied. We used a six pack of Smart Water bottles, but I have heard of other brands working.A couple precautions if you chose to do this:1) Fill the liquor all the way up to avoid detection from a shake test. As you may know liquor produces smaller bubbles when agitated.2) Replace all the caps in the pack so the white caps do not standout.3) Try to keep the packaging as intact as possible. We were able to create a hole in the bottom of the saran wrap and tape it up to look like it was not tampered at all.4) If possible use the most innocent looking person in your group to go through security. We had a half-blind grandma go through :).I cannot comment on how well these guys seal the bottles in the long run, but if you are using these for the purpose of smuggling then I recommend it. Security is catching on to the listerine, shampoo bottle techniques, etc. Best of luck!

I bought a bunch of caps for my plastic beer bottles. These are the ones that work. These are a solid white, and they have always worked for me.I've bought others that are translucent, and I've lost about 1/4 - 1/3 of my 5 gal batch over a 2 month time frame.All the other caps I bought were AquaNation caps. They either split at the top around the rim or close to the center. They are little white marks that look innocuous, but they actually let the CO2 out and your beer goes flat.

These caps saved me a lot of money. I purchased the pack for a 3 day music festival. They allow you to take in one unopened bottle of water. Adult beverages are very pricey at this event. I took in a bottle of vodka each day with no problems. They fit perfectly on an Aquafina bottle. Just be sure you screw them on well.

They are OK and keep a bottle sealed, but I don't like the design because the retention ring *stays_attached* to the cap after its opened - this makes it clunky to place back on the bottle. So I don't buy this brand any more. It's a convenience thing and maybe even a pet peeve. If you have to do something like release pressure from the bottle, this design doesn't work well. The caps sold by AHS and Mr. Beer don't have this "feature."