The ice caper

I was at the store today and there is a little cafe area with tables.  I was standing near this area waiting for some produce to be unpacked onto the displays when I overheard some young men in a discussion over a cup of ice.  The first one picked up his cup and said “Why is there water in my cup?”  The second “Dunno, no one touched your cup, I’ve been sitting here the whole time.”  “But, I put ice in my cup earlier so I could just come and get a drink now… sooooo, someone must’ve taken my ice!”

I resisted saying “AND… HERE’S YOUR SIGN!”