Pro tip, if you are around someone with hiccups and you want to help them out, wait for their next hiccup, then immediately after offer them $10 (or anything you can provide as incentive) if they can hiccup one more time. Something about wanting it makes it stop.
Unfortunately, this probably won't work on you anymore once you've read this, so sorry about that. And it only works on the unknowing a few times before they become immune, but it's a neat trick that they will appreciate it when it works!
"Putties!" was my first thought as well.