I wanted to get the last drop of paint out of the bottle and needed it to stay upside down a while so the paint would run to the lid. I was looking for something to prop it up with when my eyes landed on a Mason jar. In went the bottle and it worked perfect! I’ll never need to have ketchup bottles and other various long necked bottles upside down, balanced precariously on my counter waiting for that last drop to roll on down. What took me so long to figure that out?!