... A great bottle top!
Easily opens and closes with just your thumb. Press down on the top with your lips and you get as much water as you can drink with no bubbling or vacuum problems. It's also super easy to take apart and clean, simply push down and twist to fully disassemble. They've used a lip seal similar to the type used in high pressure applications. No traces of leaks anywhere. It should last forever with normal use. A super value for the money! ...
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