Upper Lip Hickey

How gross is this? 

We were eating lunch outside, and Greg had a bottle of water.  Ella asked for a sip and put the entire mouth of the bottle into her mouth to drink, so Greg showed her how to sip from a bottle with her upper lip tucked inside.  After she was done with her huge drink, we couldn't figure out what was on her face...turns out all the suction gave her a hickey on her upper lip!