Customer Ratings & Reviews

After several days of using the Ninja Thirsti 18oz Travel Bottle, I am amazed by its exceptional performance in holding cold and hot drinks. Its design embodies an elegant minimalism and features a thoughtfully crafted handgrip with flat areas on both sides, making it effortlessly easy to hold. This bottle has a lightweight construction that instills a strong sense of durability. Its dimensions are perfectly calibrated, allowing it to snugly fit into car cupholders and the pockets of my backpack. What's truly remarkable is its consistently effective leak-proof design, which has pleasantly surprised me by reliably preventing spills, even during the rigors of my daily backpack use. Beyond its standard features, I appreciate how the bottle's lid remains securely in place when open, thanks to a clever hinge-notch mechanism. The standout feature is its exceptional ability to maintain the temperature of both hot and cold beverages flawlessly. Crafted from stainless steel, it not only signifies durability but also resists rust. The double-walled vacuum insulation is a game-changer, ensuring that drinks remain refreshingly cold for up to 24 hours or hot for 12 hours. Furthermore, the addition of a leak-proof lid and a convenient silicone handle enhances its overall appeal. In conclusion, I wholeheartedly recommend the Ninja Thirsti 18oz Travel Bottle to anyone in search of a travel companion that possesses not only sturdiness and leak resistance but also the remarkable capability to preserve the ideal temperature of beverages for an extended period. Furthermore, it offers the convenience of easy cleaning in the dishwasher while also being free from BPA.

My new go to bottle. I spend a lot of time in and out of an office that requires all drinks to be in sealed spill-proof containers and this Ninja Thirsti travel bottle fits the bill. In fact, the more I use it the more I appreciate how well designed it is. Not just aesthetically, but there’s a lot of seemingly minor details that make a big impact on how convenient this travel bottle is to use. For instance, there’s a silicone leash that’s integrated into the top half of the body, no biggie, but the flat hinge for the leash makes a perfect anchor point to help twist the top half off without your hands slipping. Same with the 2 flat edges that run along the bottom main body which helps you maintain a good grip on the bottle without it twisting in your hands. Even the bottle cap itself is well thought out and possibly the best part about it. The square shape of the cap makes it easy to open, even one handed, and the cap leash has a detent that prevents it from hitting you in the face when you drink. Inside, the body has a smooth mirror polish which supposedly helps carbonated drinks stay fizzy longer. I can say that it definitely works, however I don’t know if it’s actually any better than any other sealed bottle. On that note, the sealing on this travel bottle is fantastic and has been 100% leak free in the week I’ve had it. It also does a great job of keeping drinks hot or cold. I wouldn’t say it’s the best I’ve had in that regard, but it isn’t a slouch either. I pack it with ice and water in the morning and the ice survives multiple refills of water and Sprite throughout the day until the evening. In terms of hot liquids, I’ll put hot tea in it at night and it’ll still be warm the next morning. Not hot, but warm enough to not need to heat it back up. The body also seems to stay at a neutral temperature which makes it easy to constantly hold. It doesn’t even feel warm when I put hot tea in it which is great, but a little jarring when you take a sip and forget that you put something hot in it. I can’t comment on the durability because I haven’t dropped it yet, but it’s made with stainless steel and BPA free plastic. It’s also dishwasher safe, though the instructions recommend hand washing if possible. Overall, this is an outstanding travel drink bottle and I highly recommend it. It has a leak proof sealing system, is easy to open, the cap doesn’t hit your face, keeps drinks hot and cold for over 12 hours, fits in cup holders, and looks pretty spiffy. As a designer, I also love the functional attention to detail like the easy open cap and flat grips. This might be my new go to for Christmas presents this year. Great job Ninja! PROS - Thoughtfully designed - Square cap easy to twist open - Built-in silicone leash useful - Leash hinge good anchor point to twist off top half - Bottle cap hinge prevents it from hitting your face - Flat edges on sides for easier grip - Fits in regular cup holders - Keeps drinks fizzy - Leak proof - Maintains hot and cold temps for hours - Attractive design - Machine washable - 18oz size CONS - Sometimes cap doesn’t twist on properly - Don’t know if it really keeps drinks fizzy longer than other sealed bottles

Awesome water bottle. The quality is great and the double sealing cap really keeps the water's temperature. Only wished I had gone for the highest capacity.

Great for keeping carbonated water fizzy. Easy open spout. A very high quality travel bottle that's just the right size. It fits easily in my car's cupholders.

The Ninja Thirsti 18oz. Travel Bottle is the perfect water bottle for me — and not just for water. I know it’s designed to go with Ninja’s Thirsti drink system, but this thing rocks as a stand-alone travel bottle. The interior is mirror-finished stainless steel. This is important when wanting to use the Ninja Thirsti with a carbonated drink. The CO2 in your drink is constantly looking for something to attach itself to — and then form bubbles (think champagne in an etched glass where the bubbles rise in a certain design). This is how to quickly lose carbonation, making your drink go flat. Ninja helps defy this process by using the mirror finish. Nothing for the CO2 to cling to. I love my sparkling waters, and the Ninja keeps the fizz going for as long as I’m enjoying the drink. The bottle even has a built-in pressure release valve. Pretty amazing. I really like the exterior. Mine is black and it’s kind of a matte finish. It feels good and secure when grabbing ahold of this thing. It’s kind of hard to see in the pictures, but there is a slight indentation on either side of the bottle, making it that much easier to grip. Nice touch. My Ninja fits nice and firmly in my car’s cupholder. This is good because the cup holder actually keeps the bottle from spinning as I’m loosening the lid. (For reference, I have a late model Chevy Blazer, so I would assume that most GM vehicles would be fine.) As far as thermal properties go, the Ninja Thirsti works great. It’ll keep my coffee hot for hours (longer than I need before a refill ;-), and I’ve come back to this following a day where I’ve had a cold beverage and there’s still ice clinking around inside. Impressive. I had to laugh at myself the first couple days using the Ninja. I was getting annoyed by the swing-away lid when taking a drink. If I didn’t hold it in place with my index finger, it would swing back and smack me in the forehead! This alone might have been a deal-breaker and a star-deductor — until I realized that all I had to do was push it beyond that first stop and it would lock in place out of the way while drinking. Doah! Anyway, the Ninja Thirsti Travel Bottle is as sturdy as I could possibly need. It looks good and works amazingly. I cannot make this thing leak — even with a carbonated beverage. Wow!

I have a few different sizes of insulated steel bottles that I use regularly for ice water. This Ninja bottle caught my attention, though, because it said it's specifically designed for carbonated drinks. The "use and care guide" that came with it says it's "engineered with a super-polished interior to prevent nucleation points that cause bubbles to escape and make your drink go flat faster." It definitely is unique from my other bottles because the inside really is polished like a mirror. It's hard to quantify how much better it might be at keeping my drink fizzy, but it does seem to work very well. Like any bottle, it holds the carbonation better when it's mostly full. I've filled it first thing in the morning, left it closed, then opened it up to have with lunch and it's just like a freshly opened pop. If I drink half of it mid-morning, though, then it does tend to go a little flatter because of the air space. The pressure sealing cap seems like a good design and is easy to use. You can twist off the small cap, take a sip, and then seal it up to keep the remaining pressure inside. The large cap unscrews for easy cleaning, and also drinking if you want to get some of the ice out. It does fit in every cup holder that I've tried. The design is simple with two vertical flat strips 180 degrees apart that help you to keep a grip on it. There's also a silicone strap attached to the lid for carrying or strapping it to something. My wife thinks the strap is the perfect size, but it's a little small for my hands. Still, I can get three fingers into the loop and that's the most convenient way to carry it. Beyond that, it's a pretty normal steel bottle. It's a convenient 18oz size and seems like it'll be very rugged. Ninja is backing it with a 5 year warranty, so it seems they expect it to be rugged, too.

Works great! Carbonated beverages were always a question of the container would hold or not with my previous cups of this style. This keeps the carbonation for a long time and keeps it cool. I did notice that you want to push the cap all the way back or it swings forward and bumps you on the nose when you are trying to drink. The handle gives you a very secure feeling while holding it and gives you something to hang it from if that is your style of carry. Very convenient. Easy to clean. I haven’t dropped it yet so I can tell you how it holds up as far as that goes. I have carried it non-stop for a while and it still looks brand new. It fits fine in the bottle holder on my bag. Since I often times don’t finish a beer or soda when I start it, it has been a game changer for me to keep it cold and fizzy longer. The opening is large enough to easily put ice in it without making a mess. Carbonation has lasted over two days. It may not be the same level of fizz as a fresh open can, but way better than if this wasn’t an option.

I was intrigued by the Ninja Thirsti travel bottle and its claims, so I was glad to try it out. In short, Ninja's claims are (mostly) accurate. The Thirsti travel bottle is made from quality materials and claims that it will keep cold fizzy drinks fizzy for up to 24hrs and hot drinks hot for 12hrs. The literature says that one way it keeps drinks fizzy is because of an ultra smooth interior surface, so there are less surfaces for bubbles to form on. The interior is indeed super smooth, and the cap has a seal to keep freshness in. However the cap is also easy to remove quickly. For the cold test I filled the bottle up with a fresh soft drink and let it sit on my kitchen counter (72F ambient temp) for 24hrs. I was pleasantly surprised that the soft drink was still pretty much as it would be out of the can and was still quite cold. However I'm sure that if the bottle was bouncing around more there would have been less fizz but I thought it kept it pretty well and also kept it cold. The hot test was a little less successful. After 12hrs my coffee was a little warmer than lukewarm, but who waits 12hrs to drink their coffee anyway?

I tested this travel bottle with hot and cold beverages. It is aesthetically pleasing with a matte black finish and chrome accents. Gender neutral styling. Although I did not purposely drop or throw this bottle, it feels sturdy enough to take some damage and still work just fine. Cold- I felt like this bottle worked best at keeping my drink cold. I made an iced coffee at about 6am. i sipped throughout the day, finally finishing it around 11am and there was still a significant amount of ice left in the bottle. my coffee was cold the whole time. I am very satisfied with these findings and continue to use it for cold drinks. Hot- I feel as though keeping a drink hot is more challenging. My findings of this theory were correct. I made my hot coffee at 6am. I once again took about 5 hours to finish my coffee. By about 9am my coffee was in dire need of a reheat. This bottle has metal in it so you cannot put it in the microwave. Generally I would finish the coffee within 2 hours of pouring it but for testing sake I took longer.