Don't leave a cup of iced coffee unattended in your bedroom for weeks

A huge sprawl of maggots will grow and live inside of it and you will be so disgusted that instead of taking it to the dumpster to dispose of it forever, you will immediately run to the balcony of your 2nd floor apartment and throw it as far away as you can. Let's just hope your downstairs neighbor doesn't wonder why there's a maggot infested old cup of iced coffee in their backyard.