Is this comparable with a wide mouth nalgene?

I would say the only thing it is compatible with is a trash can.

Does this fit the 18 oz hydroflask bottle?

No it will fit any wide mouth bottles though- I assume the 18oz is a standard mouth bottle, they do make a flex straw lid for smaller bottles

Is the straw long enough for the 40 ounce bottle?

Yes! The straw comes extra long, and you use a ruler included on the packaging to cut it to the various water bottle sizes. Tip: cut it at a 45 degree angle instead of straight across for better performance!

Does this fit the 32 oz trail series m?

If it’s a wide mouth bottle and straw lid is wide mouth yes

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💦 Sip smart, stay leakproof, and carry with confidence!

EFFORTLESS CLEAN UP - Dishwasher safe design means less time cleaning, more time living.
STAY COOL STAY FRESH - Honeycomb insulated cap preserves your drink’s ideal temperature longer.
BUILT TO LAST A LIFETIME - Backed by Hydro Flask’s lifetime warranty—durability you can trust.
SIP SEAMLESSLY ON THE GO - Leakproof Flex Straw Lid keeps every drop inside, no spills, no stress.
PERFECT FIT FOR EVERY ADVENTURE - Compatible with all Hydro Flask wide mouth sizes from 20 oz to 64 oz for ultimate versatility.

The Hydro FlaskFlex Straw Cap is a leakproof, honeycomb insulated lid designed for wide mouth Hydro Flask bottles (20-64 oz). It features a flexible strap for easy carrying, is dishwasher safe for hassle-free cleaning, and comes with a lifetime warranty, ensuring durability and reliable performance for active professionals on the move.

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140.18 DT

Duties & taxes incl.

Tunisiastore

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Product Dimensions	9.91 x 8.13 x 7.11 cm; 140 g
Care instructions	Hand Wash
Dishwasher safe?	Yes
Is assembly required	No
Number of pieces	1
Warranty description	Hydro flask lifetime warranty.
Batteries required	No
Included components	Water Bottle Accessory
Item weight	0.31 Pounds

Hydro Flask - Flex Straw Cap for Wide Mouth - Leakproof - Honeycomb Insulated Cap with Flex Strap for Easy Carrying - Dishwasher Safe - Black

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