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Hydro Flask® 64oz Wide Mouth Insulated Drinking Bottle - Stainless Steel

It's here and it's big! It's the 64oz Growler by Hydro Flask. The original vacuum insulated growler, the 64oz Hydro Flask Growler is the ideal size for filling up with your beer of choice from the local brewery and then taking that IPA or Porter to trails. Or head up to the mountain with the growler and have some coffee, hot cocoa, or hot soup waiting for you and the crew at the end of the day.

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Hydro Flask® bottles were developed to perform in every environment. Each Hydro Flask® is cast from double wall vacuum insulated food grade 18/8 stainless steel, therefore they are BPA-Free and resistant to bacteria and odors. The double wall vacuum insulation technology allows Hydro Flask® to keep contents Hot and Cold!

Double Wall Vacuum Insulation

You might be asking yourself right now, “What’s so special about a Hydro Flask® and why should I drop my hard-earned cash on yet another reusable water bottle?”

So let’s start with a simple science lesson.

Everything that has matter conducts heat, including water, air, plastic, aluminum, and stainless steel.

A vacuum is created when all of the air is removed from a sealed object. In other words, a vacuum is a space that is empty of matter, and each Hydro Flask® contains a vacuum seal between two walls of food-grade 18/8 stainless steel.

(If you’ve already figured out that a vacuum is a terrible heat conductor because it’s composed of almost nothing, you’re way ahead of “the other guys.”)

Our patent-pending double-wall vacuum insulation means that the temperature outside a Hydro Flask® has a very hard time affecting the temperature of whatever you might put in it. The best part is that this is a two-way street; whether you’ve got hot or chilled liquids inside of your Hydro Flask®, the internal temperature won’t affect the temperature of the container in your hand. That means no blistered fingers with your daily cup of Joe, and no troublesome sweat rings—from your bottle of ice water. Hydro Flasks® are pretty amazing, but we can’t make guarantees about individual personal hygiene practices!

At Hydro Flask®, our designers didn’t come up with “yet another reusable water bottle.”

They’ve created a technologically superior piece of hydration gear, one that puts a double-wall vacuum insulated barrier between itself and the competition.

Hydro Flask Infographic

What's Inside

  Hydro Flask Infographic - What's Inside
The entire Hydro Flask line is vacuum insulated which means there is an absence of matter between the two stainless steel walls. Since there is no matter, the temperature outside of the flask has a difficult time affecting the temperature of the contents inside the flask.
Due to the fact that our flasks are vacuum insulated, your hot beverages stay hot up to 12 hours and your cold beverages stay cold up to 24 hours.

All of our flasks are made of 18/8 stainless steel; BPA free and highly resistant to absorbing odor, taste and bacteria. They are simple to clean, don’t have a liner to scratch and are completely recyclable.
We guarantee every Hydro Flask against manufacturer’s defects for 100 years or one lifetime, whichever comes first.

All Hydro Flasks are made of 18/8 stainless steel. We offer a multitude of color choices with a powder coat finish as well as the Classic Stainless.

Our double wall vacuum insulation prevents condensation with your cold drinks. And, when you are drinking a hot beverage, the vacuum insulation prevents the heat to transfer to the outside of the Hydro Flask, so your hands should always be comfortable.

8/8 Stainless Steel

The following is an explanation of the chemical properties of our beloved Hydro Flasks®. If it’s enough for you just to know that they’re the best reusable drinking bottle you’ll ever own, then you’re dismissed. If you need more scientific proof to convince you, then read on!

At Hydro Flask®, all of our bottles are manufactured using 18/8 stainless steel. So what the heck does 18/8 mean? It indicates the quality of the stainless steel and refers specifically to the percentages of chromium (18%) and nickel (8%) added to provide the anti-rust/staining properties that carbon steel lacks on its own.

There are different grades of stainless steel available, with the numbers denoting their quality. Higher numbers indicate more corrosion-resisting properties, while lower numbers denote the inferior characteristics that lead to the aforementioned staining.

At the lower end, steel must contain at least 10.5% chromium to be called stainless. 18% chromium is the standard for top grade when used in flatware or cutlery, so almost all high-quality flatware has an 18/8 composition and is dubbed “food grade.” Chromium adds hardness and brightness to stainless steel, making it the source of the metal’s shine, and nickel is added to prevent corrosion by enhancing the surface layer that chromium creates.

18/8 stainless steel is the preferred material wherever food or beverages are concerned  because it does not affect flavor, either by adding any metallic taste of its own, or by retaining any flavor from the previous foodstuffs with which it came into contact. This is a function of the combination of chromium and nickel, which creates a non-porous surface that inhibits the growth of bacteria. Bacteria, which are the cause of odors, like to cling to porous surfaces where they can thrive. At the first sign of soapy water, any bacteria that have dried onto the surface of 18/8 stainless steel are swept cleanly away.

Hydro Flasks® benefit from all of the superb qualities of 18/8 stainless steel, so you’ll never have to worry that the hot coffee you took for your late-night lab session will stain your bottle or ruin the taste of your ice cold milk the next day. 


BPA Free

Our stainless steel water bottles are constructed from uncoated 18/8 stainless steel, so there is no danger of a liner getting scratched and releasing the toxic chemical BPA or Bisphenol-A into your beverage. Consequently, your Hydro Flask bottle can keep hot liquids hot without the leaching of chemicals that may occur with plastic and aluminum bottles. With Hydro Flask, you can be sure that all of our products are 100% BPA-free.

The hazards of BPA have long been suspected, though confirmed only as recently as 2006. It has been shown to contribute to hazardous conditions such as developmental toxicity, carcinogenic effects, heart disease, diabetes, neurotoxicity, and abnormally high levels of certain liver enzymes. It has also been linked to obesity, cancer and possible brain damage.

The Low Down on Plastic Bottles

By now you’d think everyone has heard the message that plastic bottles are bad for the planet, and that everyone is reducing their consumption of these little enviro-bombs as much as possible. You’d be wrong.

It is estimated that only 20% of plastic water bottles in America are recycled each year. This is an astoundingly low percentage when you consider that bottled water outsells milk and, despite the best efforts of college kids everywhere, has nearly overtaken beer sales.

In a national survey in 2007 it was revealed that as many as 72% of Americans don’t know that plastic is an oil-based product, and this same survey revealed that 40% of U.S. citizens believe plastic biodegrades when it gets to “wherever it goes.” Well, “wherever it goes” is roadsides, landfills, and the Great Pacific Garbage Patch—a floating mass in the North Pacific Ocean created by global currents and made up of over three million tons of plastic debris. This island of junk covers an area bigger than Texas!

Plastic bottles are also bad for our health. In early 2010 the FDA declared that some plastics contain the toxin Bisphenol A (BPA). More testing is currently underway, but BPA has already been linked to numerous health maladies. And it’s not just found in plastic bottles, either. Aluminum bottles, as well as some steel bottles, are sometimes lined with resins that can leach BPA into the beverages they hold.

Hydro Flasks® are made from 100% recyclable, unlined stainless steel, so when you purchase one you can feel good about knowing that you aren’t filling your body with toxins and the oceans with trash. Good job, you!

Additional Info

Additional Info

Manufacturer Hydro Flask
Model Number G6415
Length 10.80
Height 5.40
Width 5.80