This is a great bartender's trick! Below is a video on how to make this neat little souvenir. I've been delighting people with this for many, many tears. When I give it to a pretty lady I always say..."It's quite self serving, because I want to entice you to come back for the rest of the set."
People come up to me and say "I've had that thing on my window sill for ten years." This warms my heart, and theirs!