No it has been 100% leak proof! Mine worked great for a while on my hydroflask. Then the lid broke in half and I can't get the broken part off my water bottle making my hydroflask unusable. Now I have to purchase new bottle... not super happy about that.

Does it fit a hydroflask 25 oz wine bottle?

I just happened to have the wine hydro flask. I never thought to try. I immediately pulled it out tried it. It dies fit. Thank you for asking so now I know I can sip 25 oz of wine to my hearts content. :)

Does anyone have a hard time sipping? I feel like the air vent doesn't work in the lid

Yes, they messed up on this design. There is a little vent behind the spout. The first version allowed air to pass through. This new version is completely sealed. If u puncture it, you will sip fine, but it can leak if tipped over. The people who say to loosen the cap are just making air to pass through the lid. If they flip the bottle upside down, it will leak from the lid

Will this fit a 25 oz s'well bottle?

No, it will not fit a swell bottle

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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The Coldest Water Insulated Standard Mouth Size 2.0 - Hydro Sports Straw Cap Flip Top Lid - Multi-Compatible with Standard Flask Mouth Size Stainless Steel Water Bottles

The Coldest Water Insulated Standard Mouth Size 2.0 - Hydro Sports Straw Cap Flip Top Lid - Multi-Compatible with Standard Flask Mouth Size Stainless Steel Water Bottles

Product ID: 73179876

Details

Brand
The Coldest
Color
Black - Mouth
Finish Type
Polished
Material
Plastic
Product Dimensions
2"D x 4"W x

💧Optimized straw design for max flow & suction

🧼Includes straw cleaner for effortless hygiene

❄️Super insulated lid keeps drinks icy cold

Description

❄️ Sip Smart, Stay Cool — Hydration That Keeps Up With You!

ONE FINGER FLIP GO - Ergonomic flip-top lid opens with a single finger—stay focused on your workout, not fumbling with your bottle.
DURABLE LEAK PROOF DESIGN - Built tough to withstand rough use without leaks, making it the ultimate companion for your active lifestyle.
HYGIENE MEETS CONVENIENCE - Comes with a dedicated straw cleaner ensuring every sip is fresh and bacteria-free, because your health matters.
ICE COLD HYDRATION ALL DAY - Advanced insulation technology locks in chill for hours, perfect for high-performance athletes and outdoor pros.
STREAMLINED SIP EXPERIENCE - New 2.0 straw cap delivers superior flow rate with smooth suction—no spills, no fuss during your busiest moments.

The Coldest Water Insulated Standard Mouth 2.0 Hydro Sports Straw Cap is a premium, multi-compatible lid designed for stainless steel water bottles. Featuring superior insulation, an improved straw flow system, and a soft silicone mouthpiece, it offers leak-proof durability and easy one-finger operation. Ideal for athletes and outdoor enthusiasts seeking reliable, hygienic hydration on the go.

Specifications

ASIN	B07CDP4JD7
Best Sellers Rank	#158,049 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2,632 in Water Bottle Accessories
Brand	The Coldest Water
Brand Name	The Coldest Water
Color	Black - Standard Mouth
Customer Reviews	4.3 out of 5 stars 2,698 Reviews
Finish Type	Polished
Finish Types	Polished
Included Components	Lid
Item Dimensions D x W x H	2"D x 4"W x 10"H
Item Type Name	Lid
Item Weight	0.13 kg
Manufacturer	The Coldest Water
Manufacturer Part Number	4350263109
Material	Plastic
Material Type	Plastic
Model Name	UPCStandardmouthVersion2
Model Number	4350263109
Number of Items	1
Product Dimensions	2"D x 4"W x 10"H
Shape	Round
UPC	857067007271
Unit Count	1 Count
Volume	64 fluid ounces

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