LORAC lip/cheek sheer wash. Sephora sells travel sizes of these in 3 colors. I have 1 and love it. You can use more or less depending on how much stain you want to deposit on your lips &/or cheeks.
flirt cosmetics sells a lip tint which is absolutely amazing. they're called tint-a-licious lip sheers..i think they're somewhere in the hood of $10 but they're well worth the money! http://www.flirtcosmetics.com
Stainiac by The Balm. It's a water-based gel in three colours - watermelon, raspberry and coral - that can be layered deeply and doesn't smear when glosses or balms are layered over the top.