FAQs

Product Information

Is my Hydro Flask bottle dishwasher safe?

Hydro Flask powder-coated products and bottles are safe to run through the dishwasher, making cleanup a breeze. However, when it comes to Hydro Flask Coffee Mugs and the Hydro Flask Trail Series, it’s best to skip the dishwasher—they prefer a little extra TLC, where hand washing is required. 

Please be sure to note the wash instructions on each product once purchased before cleaning to ensure the proper care process is followed. Any questions regarding the care of any of our Hydro Flask products please be sure to reach out to our team at [email protected].

What should I do if my lid is leaking?

Leaking Flex Sip Lid on your coffee cup?

We recommend watching our Lid Assembly and Disassembly video to ensure you are putting all the pieces together properly.

Leaking Wide Mouth Flex Straw Lid?

– Check that the o-ring seal and red seal is firmly in place

– Check that the straw free from any holes

– After sipping from the straw, allow the water to drain before snapping the mouth piece back into place.

– Cut the straw on a 45 degree angle – if it is cut straight across it can create a vacuum.

If you are still having trouble with leaking, please submit a claim here.

Why does my flask rattle?

Rattling flasks: The rattle you hear is a small metal disc that sits between the double wall of your flask and aids in the vacuum insulation process. Sometimes the disc becomes dislodged, creating a small noise or rattle. This will not affect the insulation or structural integrity of your flask. However, if it is an annoyance, we can look to process your claim further. 

We kindly ask that you send a photo of the front, back and underside of your flask – this is to assess any damage that may have occurred, causing the disc to dislodge. If the disc has dislodged due to impact, we likely will not be able to replace your flask. However, we will assess this on receival of the additional photos – Please submit your warranty claim here!

Cleaning Method for Dark/Rust Spots

Having trouble with rust or other marks on your bottle?

Stainless Steel is not rust proof, but it is rust resistant. If you see rust it can be removed by using a mixture of baking soda and vinegar on the rust spot, let it sit for 5-10 minutes, then scrub with a soft sponge or bottle brush. If you can’t remove the rust once you have tried the above, we encourage you to reach back out and submit a claim for further review via our website.

Can I purchase a new seal?

Unfortunately, we do not sell replacement seals. You can view all of our available accessories, including lids, here.

Can I detach the mouthpiece of my wide mouth straw lid?

Unfortunately, no. The mouthpiece of the Wide Mouth Flex Straw lid isn’t meant to be detached from the rest of the lid. Trying to do so might damage it and could cause some gnarly leaks. If your straw lid gets damaged from detaching the mouthpiece, it won’t be covered under warranty.

Any damage or defect caused by cleaning, disassembly, alterations, or modifications unfortunately will void any warranty claims.

Does Hydro Flask use lead for sealing it’s bottles and tumblers?

Over a decade ago, Hydro Flask decided to break up with the old-school vacuum sealing method—the one that used lead like it was going out of style. Instead, they embraced a new, lead-free approach. A more complex process, but oh-so-worth-it! Why, because it was important to Hydro Flask to be Lead Free. 

So, what’s the secret sauce behind their vacuum insulation magic? Well, they call it “TempShield.” It’s like the superhero cape that keeps your drinks hot or cold for hours. Here’s how it works:

Double Walls: Hydro Flask bottles have two stainless steel walls. Between them lies an airless void—the vacuum space. No air means no heat transfer.

Heat Blockade: Imagine your Hydro Flask as a fortress against temperature changes. The vacuum stops heat from playing tag with your beverage. No conduction, no convection—just a chill zone inside. 

Radiation Shield: Even invisible heat rays (like the ones from that sneaky sun) can’t penetrate the fortress walls. The metal lining between the outer case and the inner chamber says, “Not today, radiation!” 

And voilà! Your drink stays frosty or piping hot, depending on your mood. No lead required—just science doing its thing.