I'm unhappy with the current design of drinking containers. At least with a glass, you only half to go a millimeter above horizontal, and gravity will empty the remains into your mouth.
But soda cans? Coffee cups? Anything with a lid creates this sort of catch-all that forces you to violently try and defy physics.
And no, I refuse to leave any of the beverage in the container. And no, I refuse to use a straw.
Solve my problem.