How about:

• Pile of vomit with posable chunks
• Stained, wadded-up underpants
• Used band-aid, bandages or sanitary napkins
• spilled can of leftover beans
• Used, inside-out latex gloves
• Half-eaten TV dinner
• Garbage bag torn open by dogs, possibly incorporating previous works
• Spilled bag of potato chips or similar
• Empty bottle of whiskey still in paper bag