What’s that smell?

Sitting around the house tonight and Nick and I kept smelling something awful – like a trash smell – as if a garbage truck was sitting outside of our front door. For the life of us we couldn’t figure out what it was. We both really didn’t want it to be bad B.O. so we chalked it up to something outside. Nick eventually sat down in the recliner and pinpointed the smell as coming from that area. We started digging around and low and behold what did we find….a hidden sippy cup under the recliner…. “Found it!” Oh – it was awful. Of course it was a cup that had milk in it and we’re guessing it’s been there since at least Friday morning. We dumped it out in the sink…as you can imagine – chunks. YUCK!

It was pretty gross. What’s the worst thing you’ve come across?