Does Eno ever exist in a powder or liquid form?
If you live in Canada and the UK, yes! Eno is found on the shelves of pharmacies (chemist shop to you in the UK!) as an aid to digestion. Eno fruit salts is added to water, and drunk while actively fizzing. No doubt, it changes the ambient mood of the digestive tract! A GIF file of an old ad for Eno is included in the Eno archives as take_eno.gif.