Tumbler Adapter for Stanley to Cirkul | Leak-Proof Silicone, Food-Grade Material, Compatible with 40oz & 64oz Stanley Quencher H2.0 FlowState Tumblers and Cirkul Flavor Cartridges (White) (White)

The media could not be loaded. Love this attachment to make any 40 ounce cup (or 60 ounce) into a cirkul water bottle. I love my cirkul but my cup is 20 ounce I think and you have to tilt it up to drink out of it. Not something I can do while driving or on conference video calls. Additionally the cirkul is so loud to drink out of.This solves both of those issues. I did attach to my Stanley in the video but also did another generic 40 ounce cup and it worked well with it too, so love the functionality.This was super easy to clean for first use and it’s a silicone type of material. It fit right into the cup easily and it won’t cup out easily either. With this attached there won’t be a like if it topples over like when I have the Stanley lid and straw in. (Even though it’s minimal spill still helps when having little ones around)Pay attention to size cup, won’t work on smaller sizes.

It didn’t fit either mine or my daughter’s cup….

This is an all silicone cover that fits snug, and it is leak proof. The pieces come apart easily, making it easy to clean. The cup we have this on isn't a Stanley and it fits. The cirkul flavoring cartridges fits snug and doesn't move around at all and it sits low in the cover.

I tried the Cirkul tumbler top, as I hated having to squeeze and slurp with my regular Cirkul water bottle. Theirs worked ok, but there were just issues with it - not enough flavor, having to rig the cartridge to make it work, and it still forced me to take tiny sips from my 40 oz mug. I drink a lot of water, and that was the biggest drawback.I ordered this, thinking it wasn’t much different, but I would give it a try. When I opened the package, the lid looked HUGE, and that prevented me from trying it at first. But I did, and once you insert the lid in your name brand or knock off 40 oz stainless steel tumbler, it is nearly flat, except for the Cirkul cartridge. SCORE.The best part is that IT REALLY WORKS. The water flows through it more freely - I think the uptake straw is bigger than the Cirkul one, so I am able to actually slug the water. It also somehow more evenly distributes the flavor - I can start with a cartridge on 4 like I did with my clear plastic bottle, unlike the Cirkul brand tumbler.Note that the color of the “white” is off-white. Not a big deal, but it most definitely isn’t white.

This tumbler adapter is a game-changer! It fits perfectly from my Stanley to my Cirkul, creating a secure, leak-proof seal. The food-grade silicone feels durable and safe, and I love that it’s easy to clean. No leaks, no hassle just a smooth transition between my favorite bottles. Highly recommend!