A guitar, in a guitar-case. I borrowed it (the case) from a friend once, in order to take a guitar with me to another country. I did not, however, open it until about 5 minutes before I had to leave for the airport. On opening it, the fragrant smell of cannabis wafted out, and I noticed numerous rolls of ash, as from the end of a cigarette or a joint, inside. I tipped out the ash but could do nothing about the smell; but the Lord had mercy on me that day, and no-one in the 3 airports I went through decided to open it – or, if they did, they figured that a guitar case merely smelling of cannabis was not reason to harass a traveller.
And a partly-melted candle.