Ozark Trail Thermos Review: If you love hot coffee you need to read this
1. Ozark Trail Double Wall Vacuum Sealed Stainless Steel Tumbler 32 Ounce
Ozark Trail Double Wall Vacuum Sealed Stainless Steel Tumbler 32 Ounce
This 32 oz Ozark Trail Tumbler is in my opinion the most versatile of the bunch. One of the main reasons that you are filling a thermos is to enjoy your beverage at the desired temperature over extended periods of time. To that end, you may be out and about for hours which means having more of your favorite drink on hand will be beneficial.
It features a double wall vacuum seal design and is built from high-grade 18/8 stainless steel. When purchasing from Walmart’s website, you have the option of selecting one of 4 colors; black, mint, silver, or tan. Another great thing that Walmart provides is the ability to purchase the 32oz Ozark Trail Tumbler in quantities of 1, 2, 4, or 6.
With a price point below $10, you are able to get 4 of the 32oz Ozark Trail Tumblers for a price that is comparable to 1 of the competitions 30oz tumblers, which to me is a huge win.
2. Ozark Trail Double Wall Vacuum Sealed Stainless Steel Tumbler 22
The 22oz Ozark Trail Tumbler is what most people think of when they are envisioning a coffee tumbler. The size is well suited for any coffee drinkers hand and it holds just the right amount of coffee to keep you from going over board and maxing out on your caffeine intake for the day in one sitting. This tumbler is the perfect size for any cup holder and has a sleek design.
With it’s double wall vacuum seal design and high-grade 18/8 stainless steel construction, the 22oz Ozark Trail Tumbler is going to keep your coffee or colder drinks on point throughout your morning commute or morning hunt.
Like the 32oz Tumbler, the 22oz Ozark Trail Tumbler comes in black, mint, silver, or tan and can be ordered in quantities of 1, 2, 4, or 6.
3. Ozark Trail 14-Ounce Double-Wall Vacuum-Sealed Stainless Steel Coffee Mug
The Ozark Trail 14oz Coffee Mug
A handled coffee mug just gives the feel of sitting back and relaxing as you get ready for your day. Tumblers without a handle are great, but I absolutely love that you can have the feel of a good old fashioned coffee cup while getting the benefit of a double wall vacuum seal in a stainless steel thermos. In my opinion, the Ozark Trail 14-Ounce Double-Wall Vacuum-Sealed Stainless Steel Coffee Mug gives you the best of both worlds.
Built to mimic the design of a standard coffee cup, the Ozark Trail 14 Ounce Coffee Mug utilizes the same double wall vacuum seal technology as their other tumblers, as well as the ultra durable high-grade 18/8 stainless steel.
This mug comes in one color which is silver, so if you like the tough industrial look of steel, you will love this mug. Like the other Tumblers in the Ozark Trail line, you can order this mug in a multipack up to 4 which is also the best value.
4. Ozark Trail Tumbler Vacuum Insulated Stainless Steel Lowball, 10oz
The Ozark Trail 10oz Tumbler in silver
If you love espresso or plan to use the Tumbler for a cold beverage, the 10oz Ozark Trail Tumbler is going to be a great option for you. Many outdoorsmen have taken their infield coffee preparation to the next level making pour overs or using a coffee press. If you plan to do something that is more in line with a high end coffee shop, you should consider this Tumbler.
Similar to the coffee mug, the 10oz Tumbler is available in silver only and can be ordered on the Walmart website in a 1, 2 or 4 pack.
5. Ozark Trail 24oz Black Light Weight Stainless Steel Water Bottle
Stainless steel water bottles have really gone mainstream over the last decade with many buyers opting for this over the plastic water bottles of old. The Ozark Trail 24oz Black Light Weight Stainless Steel Water Bottle can serve so many purposes because of its tight fitting screw on lid. Your kids can pack it for their daily water bottle at school, you can leave for work with coffee and wash it out and use it for water later in the day, or because it’s water tight you can stow it away in your hiking pack for a day on the trail.
The Ozark Trail 24oz Black Light Weight Stainless Steel Water Bottle can be purchased in black, mint, or tan and is sold in 1, 2, 4 or 6 packs on the Walmart website.
Performance Test
To test out the Ozark Trail Thermos line, I used the baseline temperature of 185 degrees Fahrenheit for all of the products I tested. My goal was to see how long I could keep a cup of coffee warm and if there would be variation in temperatures over time across the tumblers. I also used two of the 22oz Tumblers, one with the standard open mouth lid and one with a closed, spill proof lid.
I tested the temperature using a Weber meat thermometer which was $15 off the shelf. I used plain water which I boiled to temperature and placed inside each of the Tumblers and immediately closed with the provided lids.
I decided to do this test inside my house because exterior temperatures in Michigan were exceeding 90 degrees and I wanted to be able to keep a stable room temperature of 68 degrees Fahrenheit throughout the test.
I began with my initial 185 Degrees Fahrenheit temperature and tested each Tumbler 2 hours after placing the water inside, 4 hours after placing the water inside and 12 hours after placing the water inside.
Here are my results:
After 2 hours:
- 32oz – Tumbler
- Temperature – 151.8 Degrees Fahrenheit
- Heat loss – 33.2 Degrees Fahrenheit
- 24oz Water Bottle
- Temperature – 154.7 Degrees Fahrenheit
- Heat loss – 30.3 Degrees Fahrenheit
- 22oz Tumbler with locking lid
- Temperature – 146.5 Degrees Fahrenheit
- Heat loss – 38.5 Degrees Fahrenheit
- 22oz Tumbler with standard lid
- Temperature – 145.2 Degrees Fahrenheit
- Heat loss – 39.8 Degrees Fahrenheit
- 14oz Coffee mug
- Temperature – 138.3 Degrees Fahrenheit
- Heat loss – 46.7 Degrees Fahrenheit
- 10oz Lowball tumbler
- Temperature – 131.4 Degrees Fahrenheit
- Heat loss – 53.6 Degrees Fahrenheit
After 4 hours:
- 32oz – Tumbler
- Temperature – 135.8 Degrees Fahrenheit
- Heat loss – 49.2 Degrees Fahrenheit
- 24oz Water Bottle
- Temperature – 143.4 Degrees Fahrenheit
- Heat loss – 41.6 Degrees Fahrenheit
- 22oz Tumbler with locking lid
- Temperature – 131.8 Degrees Fahrenheit
- Heat loss – 53.2 Degrees Fahrenheit
- 22oz Tumbler with standard lid
- Temperature – 128.6 Degrees Fahrenheit
- Heat loss – 56.4 Degrees Fahrenheit
- 14oz Coffee mug
- Temperature – 118.8 Degrees Fahrenheit
- Heat loss – 66.2 Degrees Fahrenheit
- 10oz Lowball tumbler
- Temperature – 111.9 Degrees Fahrenheit
- Heat loss – 73.1 Degrees Fahrenheit
After 12 hours:
- 32oz – Tumbler
- Temperature – 100.2 Degrees Fahrenheit
- Heat loss – 84.8 Degrees Fahrenheit
- 24oz Water Bottle
- Temperature – 111 Degrees Fahrenheit
- Heat loss – 74 Degrees Fahrenheit
- 22oz Tumbler with locking lid
- Temperature – 96.9 Degrees Fahrenheit
- Heat loss – 88.1 Degrees Fahrenheit
- 22oz Tumbler with standard lid
- Temperature – 93.6 Degrees Fahrenheit
- Heat loss – 91.4 Degrees Fahrenheit
- 14oz Coffee mug
- Temperature – 82.8 Degrees Fahrenheit
- Heat loss – 102.2 Degrees Fahrenheit
- 10oz Lowball tumbler
- Temperature – 80.8 Degrees Fahrenheit
- Heat loss – 104.2 Degrees Fahrenheit
Performance Take aways
Overall I was pleased with the results of the Ozark Trail Thermoses I tested. A few of the key points that I think should be mentioned are listed below.
- There is a direct correlation between the size of the thermos and its ability to retain heat over time.
- The 24oz water bottle was the clear winner even though it was not the largest of the group. The screw on cap vs. the insulated lids appear to give the 24oz bottle an edge.
- There is very little difference in heat retention when using the provided lid vs. the additional locking lid, so the real benefit of the additional lid will be in keeping your beverage inside the mug.
- As a whole, each respective Tumbler has a specific application and will do a very good job at retaining heat when you are on the go.
One more very important thing to mention in the performance category is that when it comes to my personal acceptable temperatures to drink coffee, each of the Tumblers that I reviewed exceeded the performance numbers listed on the Walmart website.
What is a Double Wall Vacuum Sealed Thermos?
If you are wondering what makes a double wall vacuum sealed thermos superior to other designs, we can help clear the air.
This design consists of, you guessed it, two stainless steel walls as well as a vacuum sealed chamber that sits in between the two walls. With a traditional single wall thermos, convection occurs transferring the internal heat out or vice versa, impacting the liquids temperature over time and at a greater pace.
The vacuum chamber in a double wall vacuum sealed thermos prevents that convection from occurring and greatly increases the duration that your drink remains at the desired temperature.
Difference in Lids
One of the things that I was curious about was how well the lids performed. The locking lid and open mouth lids do seem to provide similar results when paired with the 22oz Tumbler, but I had one more text I wanted to run.
Using a thermal imaging scope from ATN, I filled one of the 22oz mugs with water boiled to 185 degrees Fahrenheit and another filled with water boiled to 140 degrees Fahrenheit.
You can see in the image below that the thermos on the left has the hotter water, however the heat signature on both Tumblers is only present inside the Tumbler.
Once the lids are placed on to the Tumblers you can see a bit more in relation to how they work. With the locking lid, there appears to be more heat transference than the open mouth lid. Even with the locking lid absorbing more heat, it does provide a few degrees more heat retention over time.
Are the Ozark Trail Thermoses dishwasher safe?
Yes, for safe dishwasher care it is recommended that you place the Tumblers on the top shelf.
Are the lids interchangeable?
Yes! You will have two different sizes of lids across the Ozark Trail line, one lid size will fit the coffee mug and larger tumblers like the 32oz while the smaller lids fit the more slender tumblers like the 22oz and 10oz.
Does Walmart offer replacement lids?
Yes! You are able to purchase additional lids both in a spill proof configuration and the open mouth version that comes with the tumblers.
Is this line of thermoses BPA free?
Not only is the Ozark Trail line of thermoses BPA free but they are also rust proof and feature a sweat-proof design.
Does Walmart offer a warranty on the Ozark Trail Thermos Line
Walmart provides a lifetime warranty on their Ozark Trail line of thermoses
Does Walmart allow returns on the Ozark Trail Tumblers?
Yes, Walmart has a very easy return process and most returns can be sent back fro free. You can view the return policy here.
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