The vent hole is too small. When you sip from the straw, the vent hole doesn't let enough air in so it creates a vacuum seal and you have to suck harder. It makes is too hard to sip from the straw. I end up unscrewing it to let air in that way. Not sure if I can make the hole bigger or what? I purchased the Flip or Sip Dual Drink Cap and LOVE it. I would highly recommend that one. But it looks like it's being discontinued.
Wide-Mouth Straw Lid for Fifty/Fifty Bottles
Great quality product at a great price
I ordered a 40 oz bottle with a wide mouth straw, it was very nice. I ordered purple because my granddaughter is not a fan of the color. Well, as soon as she saw my bottle it became her favorite even though she has not one but two other 50/50 bottles! I now am the proud user of a blue bottle and she uses my purple one😊
The bottle is nice, but it doesn’t keep Ice very long. I have a bottle from another company that keeps ice in water for like 3 days. This one doesn’t even keep it for 24 hours.
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