Vessyl made waves in 2014 as the first smart cup — a thermos that could detect what you’re drinking and how much of it. Why? Something about fitness tracking and hydration, I don’t know. No one really knows, because Vessyl as it was pitched on Kickstarter never came out. The company eventually shipped Vessyl Pryme, which can track how much water you’ve had to drink and remind you to drink more (if thirst doesn’t do the trick), but Vessyl itself is still marked as under development three years later.