MRbrew Plastic Carbonation Cap, 4 PCS Ball Lock Keg Post 5/16'' Beer Line Nipple Barb Homebrew Kegging Soft Soda Drink PET Bottles Counter Pressure Bottle Filling Cap with Spare Sealing Gasket O-rings

Brilliant universal replacements Great job

Works well

All caps leak. Unable to hold/ retain pressure.

The Plastic Carbonation Cap with Ball Lock Keg Post works perfectly for quick carbonation and pressure transfers. It fits tightly, seals well, and is compatible with standard PET bottles

Works great. Plastic not too soft and wears well. Screw on tight. Based on how well these worked I upgraded to a Soda Stream. Would buy again

They are pretty good but the inside part can sometimes get lose so be mindful to check everyone and while to screen the spring tight.

I purchased a number of these to streamline carbonation of beverages in 1L bottles. These seal very well without any force at all on a 60# charge. They are sized so that two different brands of charging fittings go on and off equally well. Get a Bunch of these. Charge your drinks and refrigerate until use with these caps still on the bottle. Take them out and top them off at the time of use. Switch then to a standard cap if you want.

Freshens up flat soda, or makes new soda. With these I can make soda far cheaper than soda-stream will allow.