Re: Why buy this stuff in the first place?
The Hidrate [sic] Spark's website is that great border area between serious and satire:
"Syncs with Fitbit, Apple Watch & Health, Under Armour Record, Nokia Health Mate, and Google Fit.
These are optional fitness integrations. The bottle and app can be used without them."
"Proven to be accurate within 3% compared to manual recordings during a medical study."
"Keep an eye on friends and make sure they stay hydrated."
"Never lose your bottle. See your bottle's last synced location in the app."
And then a "benefits of water" section that interestingly enough fails to list "postpones death, but doesn't avert it".