Under Armour 64 Ounce Foam Insulated Hydration Bottle Review

Under Armour 64 Ounce Foam Insulated Hydration Bottle Product PhotoBranching out from the world of athletic apparel, Under Armour has ventured into the world of water bottles with its 64 Ounce Foam Insulated Hydration Bottle. At a massive 64 ounces, this bulky bottle can work as a simple metric for making sure you get your recommended eight 8 ounce glasses of water each day with just one fill.

As cool as the Under Armour might look on the surface, we found it had more than a few flaws as we put it through its testing. We were immediately skeptical of the power of foam insulation, but as it turns out this probably isn’t the bottle’s weakest feature. But our first point of interest in testing was in examining its advertised ability to keep drinks cold for up to 12 hours. We got our hands on one to put that claim to the test and examined how well Under Armour’s 64 ounce Foam Insulated bottle stacks up to the competition.


Getting To Know The Under Armour Foam Insulated Hydration Bottle: Insulation, Insulation, Insulation

Closeup of the Under Armour 64 Ounce Foam Insulated Hydration Bottle LidIf you are in the market for an insulated water bottle, I would suggest looking at our article, “Best Insulated Water Bottles – Our Top Picks”, where we go into detail about insulation for flasks and our favorites. One of the first things you might notice is that the Under Armour 64 Ounce Foam Insulated Hydration Bottle did not make the list. We will go into some of the reasons for that later, but one big reason right off the bat is because it utilizes foam insulation. Without a doubt, the best insulation for your hydration flask is a stainless steel double walled vacuum, meaning there are two walls separating your drink from the outside world with almost nothing in between them (a partial vacuum.) This prevents heat transfer and can keep your cold drinks cold for up to 24 hours, twice as long as Under Armour’s Foam Insulated claim.

Double walled foam insulation is a similar concept, employing the double-walled construction concept but with foam in between the walls instead of the vacuum. The foam slows heat transfer, but not to the same degree as a vacuum insulation. It also does not work as well for hot liquids, keeping them hot for about 3 hours, whereas the stainless steel vacuum bottle’s should stay hot for 12+ hours.

Then again, we can see why not everyone would need to keep their drinks cold or hot for such long periods of time, and the Under Armour Foam Insulated bottle is about half the price of a good quality stainless steel double walled vacuum bottle that holds the same amount.

Unfortunately, the Under Armour bottle doesn’t even quite live up to its advertised insulating claims. Our testing with this bottle concluded that it kept our drinks ice cold for only about 8 hours of the claimed 12, at moderate room temperature. So it is pretty clear that any way you slice it, foam insulation is inferior to its vacuum-insulated stainless steel counterparts.

About the Bottle


The Under Armour 64 ounce bottle looks like it is actually armored. It is big, thick, and gives off a vibe of invulnerability. The bottle itself is extremely sturdy; though we’ve only had it a few weeks, we have already tested its durability by dropping it several times. Not a scratch or a dent to be seen. This is something that will come in handy, because more often than not we dropped it because this massive bottle feels very bulky and clunky in your hands, and can be on the heavy side when completely full. There are no handles to hold while drinking and it pretty much demands you to use both hands. The bottle features a handy fold able carrying handle with fence hooks to attach and hang itself, but those prove useless while actually drinking from the bottle.

The only vulnerable part of the bottle is the plastic lid cap. I have read through complaints of many people breaking this cap, leaving the drinking spout open, allowing your drink to flow out freely. There is no easy replacement option for this semi-fragile cap, and Under Armour redirects you to the manufacturers. This is a huge negative because if your cap breaks, you absolutely can not allow your bottle to be turned side ways or flipped upside down while traveling. It is unfortunate that they do not offer or sell a replacement cap. From our experience, the one handed push button lid feels nice to use, and our cap has had no issues, but we see how it could break with a well placed drop.

Other Common Complaints

Under Armour Company LogoSome customers have reported mold growing in the lid, which is ironic due to the fact that they brand it as a hygienic cover. You can help prevent this with proper washing and drying – when you clean your water bottle, make sure it is fully dry and has a chance to properly air out.

The bottle is BPA free and has a layer of black plastic coating it. It gives off a big, strong, cool aesthetic while branding you as someone who cares about fitness and athletics with the Under Armour logo. However, the black plastic, which helps make the bottle as durable as it is, easily picks up heat and can become hot to the touch. It may keep your drink cold for awhile, but the exterior can become hot enough to be unpleasant to hold – some have complained that it went so far as to lightly burn their hands and lips.

Conclusions and Review Summary

64 Ounce Foam Insulated Under Armour Water Jug with Carrying HandleThe Under Armour 64 Ounce Foam Insulated Hydration Bottle is far from the highest quality Insulated bottle you can get. It’s claimed heat resistance is less than half a top tier Stainless Steel Vacuum Insulated bottle, and it does not seem to quite make it to its claim. Though, it is also less than half the price. The bottle is big and sturdy, the plastic cap being its one main little weakness, but much like the Death Star only having one small weak spot which can render the whole bottle useless.

Having a 64 ounce bottle can be a nifty way to easily get your daily recommended water intake by just filling a single bottle one during the day, but the Under Armour unfortunately does not use its size well. It is bulky and difficult to hold and drink from and overall suffers from a variety of design flaws. It might function better as more of a water jug to pour water into other vessels, rather than a standalone water bottle. But even then it suffers from a bulky construction and lack luster insulation.

We give the Under Armour 64 ounce Foam Insulated Hydration Bottle 2/5 stars. Not looking too good.

Learn More About the Under Armour Hydration Bottle

To check current prices, read other reviews, or get more specific details, be sure to visit the Amazon listing.

For a different take and another look at the Under Armour Hydration Bottle, have a look at this YouTube clip by user EXP REVIEWS as he reviews his Under Armour bottle.


High Capacity


Poor Insulation
Bulky Container
Low Construction Quality

  • Editor Rating
  • Rated 2 stars
  • 40%

This huge 64-ounce behemoth from Under Armour is equipped with some unusual foam insulation and a bulky design.

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