Cirkul 40oz. Fog Stainless Steel Tumbler with Handle, All-Day StrawSip, Double-Wall Insulated

One of my friends uses this water bottle system, and she told me how much more water she drinks now that she has switched over to it. She talked about how amazing it was that the spout was constantly being thrown away making it so much easier to clean. She talked about how much her kids loved it. I was sold and I bought it. I had visions of just adding water and running around drinking lots of fabulously flavored treats while losing weight and gain hydration. I am pleased to say she was right after I got past the first cartridge. My first cartridge was broken. I got lots of air causing me to burp, but very little flavor. Thankfully I resisted the urge to just throw the whole thing in the trash and I tried another cartridge. Cartridge two lived up to the hype. I now have to buy another one fir my son who keeps drinking from my water bottle. I love this water bottle! As someone with a family history of kidney issues, hydration is essential. I am drinking water nonstop without thinking about it. No more forcing myself to meet my hydration goals.

Keeps liquid cold

I was very disappointed to receive this without filters. The photo and description lead you to expect it comes with filters (as other cirkel products do) Looking back now, in teeny print, it says filters sold separately. Very disappointed and expensive. I wouldn't recommend

You have to suck on it much harder than a regular straw. Refills don’t last long at all and even on maximum setting flavor is weak. Plus refills are expensive. Should come with an additional plain lid for variety if you want to use cup without cartridge. Not terribly impressed.

Cirkul stands behind their products, even on Amazon! There was a small dent in my cup and they gave me the option how to make it right. I love my Cirkul sip cup! I've been a fan of the other styles of Cirkul cups as well for a few years!