does this fit the old style wide mouth hydroflask 32 and 40 oz?

Hello, Miguel from Tall Ridge here! Yes, this is designed to fit both the newer versions as well as the older generations of wide-mouth bottles. I hope you find this helpful.

Does it fit a 32 ounce?

Caps are universal. Standard and wide mouth is all you need to know. So, yes it will indeed fit a 32 oz.

Would this lid fit on a 40oz wide mouth Hydroflask water bottle?

It does,but you should be aware it's a tight fit. I put mine on a 32oz wide mouth bottle and it seals tight and does not leak when knocked over or held upside down. But putting the lid on and taking it off can be difficult.

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💧 Stay cool, stay hot, stay ahead with Hydro Flask Flex Cap!

ECO CONSCIOUS DESIGN - Crafted from BPA-free, fully recyclable materials to protect your health and the planet.
BUILT TO LAST FOREVER - Backed by Hydro Flask’s lifetime warranty—hydration peace of mind guaranteed.
EFFORTLESS PORTABILITY - Swivel handle designed for comfortable, on-the-go hydration.
SEAMLESS COMPATIBILITY - Fits all wide mouth Hydro Flask bottles for a perfect, leak-proof seal every time.
ULTIMATE TEMPERATURE LOCK - Honeycomb insulation keeps drinks icy cold or piping hot for hours.

The Hydro Flask Wide Mouth Flex Cap is a durable, BPA-free, and recyclable accessory designed to fit all wide mouth Hydro Flask bottles. Featuring a leak-proof swivel handle and honeycomb insulation, it maintains your beverage’s temperature longer while offering ultimate portability. Backed by a lifetime warranty, this cap is the perfect upgrade for professionals who demand reliable hydration on the move.

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Brand	Hydro Flask
Model Number	WFX001
Product Dimensions	6.86 x 6.86 x 6.86 cm; 5.17 g
Color	Black
Name List for Name Plates	Flex Cap
Material	Stainless Steel
Wallpaper Pattern	Solid
Quantity	1
Laser Class	Dishwasher safe, insulated, leak proof, wide mouth
Included Components	Lid
Are Batteries Included	No
Model Year	2020
Item Weight	5.17 g

Hydro Flask Wide Mouth - Wide Mouth Water Bottle Accessory

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