This reminds me of a remedy I hate to admit I've used...I get TERRIBLE hiccups. Friend told me douse the flame of a wooden match (you know, kitchen safety matches? strike anywhere kind) in half a glass of luke warm water, then drink slowly.
I hate to say that while I LITERALLY have tried everything else, this works.
But I can't imagine loading up my bp in the car for a ride around the block...
Have you ever tried not using the match trick? Just drinking luke warm water slowly. I think the match is just a placebo effect...
You should have someone trick you someday thinking your drinking match water LOL