What is this?

One night this past week, we got home around 7ish in the pm from being out and about all day. We found this black bag on the handle of our apt. door. Had no idea what to expect! I open it and it has two eggs, a carton of milk, a thing of wipes and information fliers (in Korean of course). SOOO bazaar! Who knows how long it had been there. Needless to say...I threw the eggs and milk away (they were warm) and you can never have too many wipes with a 3 year old running around! :)