[This review was collected as part of a promotion.] It’s a great cap, but whenever I take a sip, there’s an annoying squeak sound that resonates from the cap. It sounds like a dolphin and it’s always when I suck, which is what you have to do in order to get some of the water inside my bottle. Other than that, it’s quality. The sound is just annoying, and I’m not sure if that’s supposed to happen.
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