Like many other Australians, I cannot drink alcohol nor eat food containing alcohol, for health reasons. I asked my pharmacist if there was a disclosure pill, paper etc which reveals the presence of alcohol in a food or drink etc. The pharmacist said he'd never heard of it, but it was a good idea.
I think it may be an even better idea if someone could help me invent the product, and market it. It could also be used in situations where drink spiking occurs. Hence it has a safety aspect, not to mention the health side.
On thinking about it, I said "Why can't I already buy this product?" Simple answer: Nobody has thought of it.
The idea must be worth a bit, but to make a quid from it?