Ninja DW2401GY Thirsti 24oz Travel Water Bottle, For Carbonated Sparkling Drinks, Colder and Fizzier Longer, Leak Proof, 24 Hrs Cold, Dishwasher Safe, Stainless Steel Insulated Tumbler, Charcoal Gray

Fair warning up front, I have not had this long. It's worked quite well since I got it. I recently started carbonating my own beverages, and this has done quite a nice job of keeping them at least sparkling over an 8 hour shift. It does an excellent job keeping the drink cold (I have not tested anything hot). There's a little rattling noise now, like a bit of solder bouncing around in the vacuumed area of the bottle, but I haven't noticed any decrease in utility. It certainly keeps ice well, I have had it keep ice machine ice in there for a day. It's a bit short of a liter in volume, but it holds a good amount and I've not seen any leaks. The cap takes a bit of getting used to, but as long as you push it far enough towards the handle it will stay put as you drink. It doesn't keep things fully carbonated, but that's no surprise if there's no pressure to keep the gas in the liquid after you drink >half the bottle.

I must have carbonation — I can't stand flat flavored drinks. I put this Ninja to the test on Friday night: filled it with ice from my fridge and added carbonated water. All weekend long, I alternated between sparkling water and natural energy drinks. Not only did the ice last 2 full days, but everything stayed fizzy until the last sip!I’ve used Yeti insulated cups before — great at holding ice, but the carbonation? Gone within minutes. The Ninja has officially earned its place: Yeti for hot tea, Ninja for all my cold drinks from now on.Only problem? Now I need to buy another one for the office. 😂

My Amazon review:Absolutely—here’s a short, funny review you can share with your colleagues:Had a damn fine day with the Ninja Thirsty. I drank more water than ever because I couldn’t see the water line—so I chugged it down like a champ. My other bottle always tricked me into thinking I had enough, but this thing stayed cold, looked good, and made me realize I’d slammed 85% of my daily water by 1 PM—usually I’d be stuck at 60% by then. Fits in my car cupholder like a dream, unlike my sippy cup. 10/10 would sip again, but I definitely need to pace myself!

Keeps my carbonated drinks cold and fizzy for a long, long time! Place it under your Ninja Thirsti, make your desired beverage, and away you go! The attached strap makes it easy to carry and it's slender design allows you to place it right in your car's cup holder.

It keeps my water cool and refreshing for a long long timeDoesn’t cause funny tasteI love that it doesn't have a strawThe only issue is that both sizes won’t fit in the cupholder as advertised

This bottle actually keeps your soda fresh and fizzy for a long time. Keeps ice for longer than a day too! Much longer than a Stanley or any other leading product. I highly recommend!

I left my bottle in a hot car over 90 for 6 hours and my drink was still cold. No ice was out in it. Just cold Mt Dew Out of the fridge. I was impressed.

I love this bottle for my Ninja Thirsti. It does a great job of holding the carbonation. I do find it does not get clean in the dishwasher though. It’s skinny so it doesn’t get rinsed out well.