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I was skeptical about a little silicone piece doing much, but it really does stop the water from rushing up when you take a sip. Pops right out for cleaning too, which is all I ask for.

The flexible silicone fits snugly but pops out in seconds when I want to clean it, and it’s completely stopped the dribble on my commute. Honestly didn’t expect such a small insert to make that much of a difference, but my desk and my shirt are both staying dry now.

I was skeptical a little piece of silicone could make a difference, but it seals so snugly that I can finally sip while walking without dribbling down my chin. Pops out in a second when I want a full gulp, too.