One handed - that's how I do most things these days.
Eating, brushing my teeth, putting in/removing contact lenses, washing my hands individually (this takes mad skill!), typing, reading, and cooking... I've mastered all these tasks one-handedly while holding a baby with the other.
(although I must admit, I've yet to master the art of taking iphone photos one-handed... I find it impossibly awkward!)
I never imagined I'd require skills like this... but there's a lot they don't tell you about motherhood that you have the pleasure of discovering on your own ; )