Right. Until you move your right foot to the gas pedal and your left foot to the clutch pedal. I have fat legs and I still spilled one while shifting.
It's very cool! I wish I could make one for myself. Yet, when my cup holder got broken and I kept spilling my coffee all over the dash, I had to shop for one. I never shop on junk yards for the things I often touch (that's my rule), so I checked pricing with the dealer. And I must admit, prices there fly! So I went ahead and ordered an aftermarket one - way cheaper and brand new (https://www.carid.com/cup-holders/). It was not that easy to install though, as I had to figure out how to remove plastic panels to get to the mounting point. It's not too bad I wish they made it a little more simpe. Of course it's not as badass as these pistons but looks pretty clean as if it came with the car. But I really like your solution, man!
