Worked until update.

After the update the bottle does not sync correctly no matter what I do. Even if it does sync to the thermos app, it will no longer sync with my Fitbit app. I have tried everything from not allowing access to my Fitbit app, to uninstalling the thermos app and restarting the bottle. Spending $60 to have something tracked and synced to your other health apps is kind of dumb. But spending $60 on a plastic water bottle is insanity.

Young gummy about Thermos Smart Lid, v1.3