I LOVE my eyeliner, and the stuff stays on forever, even through tears. Seriously, I've fallen asleep with it on and the next morning its still on perfectly. Its not exactly a liquid, but its not a pencil either.
Bobbi Brown's Long Wear Gel Eyeliner
http://www.bobbibrowncosmetics.com/t...674&AD_ID=9054
And definitely get some waterproof mascara. For mascara I prefer plain old Maybelline.