Why choose Mermaid?
Most 40oz tumblers use a press-on lid with an open straw hole. That's why they leak the second they tip in a tote bag or a car door. We built the Flo Tumbler with a screw-on lid, a magnetic seal, and a silicone gasket around the straw, so 40 ounces stays where you put it. Same capacity everyone else offers. None of the cleanup.
40oz Flo Tumbler - White
Meet Flo, the tumbler that makes hydration effortless. Designed for every part of your routine—from busy mornings to long drives and late-night sips—this 40oz stainless steel tumbler keeps your drink the perfect temperature for hours.
Features:
- 40oz capacity with double-wall vacuum insulation
- Keeps drinks cold for 24+ hours or hot for up to 12
- 100% leakproof screw-on lid with flip-up covered straw
- Built-in silicone straw tip for comfort and grip
- Designed for right or left-handed use
- Cup holder friendly base fits most standard sizes
- BPA-free and easy to clean — all lid parts are removable
40oz Flo Tumbler - White
Not Just A Tumbler.
It's the last one you'll buy.
Sealed Shut, Not Just Covered
Screw-on lid, magnetic seal, silicone gasket, flip-up straw cover. Throw it in your bag sideways and forget about it.
24 Hours Cold. 12 Hours Hot.
Double-wall vacuum insulation. Ice you pour at 7am is still ice tomorrow morning, and the outside never sweats.
Fits Your Hand. Fits Your Cupholder.
Tapered base drops into any standard cupholder. Ergonomic handle, easy on the wrist, and it works right or left handed.
14 Designs, Released in Limited Runs.
Celestial. Twilight Garden. Daydream Daisies. New drops all year, so yours doesn't get mixed up with everyone else's at the gym.
Try It Risk-Free.
Free shipping over $55. 30-day returns. Backed by our Lifetime Warranty.
Loved by thousands - Order YourS Today
THE MOST STYLISH (AND LEAK PROOF) TUMBLER YOU'LL OWN
FREE SHIPPING
Order two or more tumblers, get free shipping.
LEAKPROOF GUARANTEE
If you don’t absolutely love your Mermaid, send it back no questions asked.
LIMITED EDITION DESIGNS
We're adding new designs all the time, but once they're gone, they're gone!
