40oz. Midnight Blue Stainless Steel Tumbler with Handle, All-Day StrawSip™, Double-Wall Insulated

I’ve been using the Cirkul 40oz Ranger Stainless Steel Tumbler for a while now, and it’s made a huge difference in how much water I drink each day. The large size is perfect for staying hydrated without constantly refilling, and the insulation really works—I can leave it on my desk all day and my water stays cold and refreshing for hours. The color I chose looks great too, and the finish has held up well without scratches or fading. One thing I really appreciate about this tumbler is the flexibility of the Cirkul system. Being able to use flavor pods makes drinking water a lot more enjoyable and helps me hit my daily hydration goals. I did run into an issue with a few pods not working properly, but when I reached out to customer service, they were quick, friendly, and very helpful in resolving the problem. That kind of support makes me feel even more confident in the brand. The overall build quality is solid—the stainless steel feels durable, the lid fits securely without leaking, and it’s easy to clean. I’ve used plenty of tumblers in the past, but this one has become my go-to because of its size, design, and how well it keeps drinks cold. If you’re someone who struggles to drink enough water or just wants a stylish, reliable tumbler, this is definitely worth it. I’d recommend it to anyone looking for both function and style.

The tumbler itself is a nice size, with the 40-ounce capacity making it great for staying hydrated all day without constant refills. The insulation works well, keeping drinks cold for hours, and the handle makes it comfortable to carry. The StrawSip lid is convenient and spill-resistant. However, like with the flavor pods I reviewed earlier, I still run into the same issue where they often stop dispensing flavor while there is liquid left inside. This makes the system less convenient than I had hoped, especially given the higher cost of the pods. If you already use and enjoy the Cirkul system, this tumbler is a good upgrade in size and insulation, but the pod performance may still be frustrating for some users.

This is an amazing product. The size alone is great to get in all your water supply for the day. It works great, just sip and go. The color is perfect and bright. The flavors of cartridges makes drinking water delicious.

Love the cup and all the flavors that they make to go along with it.

So the 40oz Cirkul Tumbler has its ups and some pretty glaring downs. So I will start with the positives the positives with it is a definitely holds a lot more water which equals a lot less refills. The cups design is definitely thoughtful the bottom is a little bit thinner and it allows it to sit and cup holders easier and it does have a rubber/silicone bottom which helps it with keeping grip to a certain extent. The lid is also pretty interesting if you didn't know there's a little arrow on the lid and if you point it to the L and tighten it from there and that makes it to where the cup can be now held with your left hand and if you do vice versa you can hold it with your right hand definitely makes it easier for those who prefer to hold it in a certain orientation. Now let's go to what would be consider the Cons. The biggest and probably the most complaint that I've seen about this is when it comes to the flavor it is a struggle to make your pods work. I have realized that you do need to "prime" the pod which can be a pain. There's many different ways how people prime there so it's kind of a trial and error process but once you do get the flavor going at stays. One thing that people have noted is you could take the rubber stop out of it that keeps it from spilling but I did try that and it didn't really help much I just put it back in and I figured out how to make it work. Overall I would say that if you enjoy drinking Cirkul this 40 oz tumbler definitely makes it easier when it comes to having more water capacity. But there is the trade off of dealing with the flavor pods and really dialing that in so if you don't mind that I would definitely say go for the Tumblr. If you don't mind constantly refilling up your bottle whether it be the stainless steel one or the plastic then I would say stick to that only because you really don't have to mess with the flavor pods and I will admit that is probably the most annoying part especially when your flavor pod is done and you need to move to the next one. So I gave this a 4 out of 5 stars it is more preference. Hopefully they figure out and work with their design team or whatever they use and they figure out this problem and push out a product that works like it's supposed to.

Ice retention is awesome in this cup, So far it is leakproof. Easy to clean, And it’s a XL cup which means it will hold alot of water. This is my second purchase for a cup like this ( This particular cup is a gift for someone who will love it as much as I do) …

I don't like my new Cirkul 40oz Tumbler, I love it. The flavors are awesome and there is such a good variety of them. Also, I like the enhanced flavors with vitamins and or caffeine, among others. The only thing is I cannot get flavor sipping with the tumbler upright like in the advertisement. I have to tip it up and sip and then I get a flavor "shot" which I wash down with regular upright sips of water. I suppose it works for me just like the plastic bottles. I still like it much better than having to deal with the overly sweet, flavored waters or water flavor packets or drops you get from the store. I also like that you can just drink the water without flavor by turning the flavor dial down to zero. I only want a little bit of flavor like infused water, so I don't mind a lower flavor dial setting, like 3 or 4. You still get quite a bit of flavor at 9. I have filled my 40oz up half with ice and water like, 10 times since I got it, and I am still on the same Honey Crisp LifeSip cartridge. So, I am pretty pleased with how long the cartridges are lasting and how much money I am saving on buying flavored water/diet sodas. Overall, I would recommend this product. As long as Cirkul stays in business, this is a game changer for me as I needed to get away from diet sodas and drink more water. I also got the 42oz regular plastic bottle with a matching chill sleeve directly from Cirkul. I am still waiting for that to arrive, but I am sure I will love it, too. My husband even likes it. So, he is going to be using the free bottle we got from making our first order for drinking with the energy drink sips like InFlow and Fission. If you are looking for a convenient way to increase your water intake and add your customizable flavor, this is product is ideal. EDIT 11/14/2025: I ended up returning this because it became to difficult to get any flavor sipping through the straw. My 42oz. plastic Cirkul bottle works perfectly.

Perfect for those who need to hydrate but “don’t like” water. I am not part of this group, but I’ve heard so many individuals say something along the lines of “ I’m dehydrated, cause I don’t like water because it doesn’t have a flavor”. So I think that the Cirkul cup is the perfect solution. You just insert the flavor straw into the lid and start sipping away. There’s are a few different flavors to choose from and I think they are all good. I like that you can choose how much flavor you get so you can have it super strong or really weak. You can even have it where you drink just plain water if you like, which is nice. Tumblr cups are my favorite to travel with because if they get tipped over, they don’t leak which is important while traveling. Plus they keep your drink, cold longer because of the great insulation. These are a great gift for family and friends and they come in many different colors so there’s a perfect one for everyone