Tank Backpack

[RSOD]

Please add a way to also draw from any containers you have in your active hand, so we can steal large amounts of lemon-lime flavored, highly caffeinated soda from the bartender while they aren't looking. 

That's how the draw / drop mode works! Theoretically, you'd just swap to draw mode and click on the backpack with the container you want to siphon from in your hand. It's a bit slow switching via click-dragging to yourself, but it isn't meant to be the peak of technology anyways