Is there a hole in the lid/cap to help release the vacuum in the bottle when you suck on the straw?

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Is there a hole in the lid/cap to help release the vacuum in the bottle when you suck on the straw?

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Not that I know of? It worked just fine for about a week, and I never did anything different or took the straw off the lid and it started doing it I made sure it was all the way on etc

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Yes there is and it works great! No suction problems at all.

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I don’t really know what that means, but you can suck on the straw like any other straw, and this cap still keeps my water the same temperature.

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