My partner had one until about a year ago when it broke irreversibly.
They’re still making payments on it and the thing was already on its third screen when it died. They’re cool and I think the idea is good, but I think the whole “bendable screen” idea is fundamentally flawed for smartphones.
We use liters for soft drinks and liquor, but gallons for fuel, milk, and water. For recipes we use fluid ounces or cups since gallons are kind of a large for that.
It’s actually a mixed system, similar to the UK but with less metric in the mix.