Frozen liquid is just soothing for some reason. I had food poisoning once, which caused severe vomiting. The doctor prescribed something and told me to try eat a Popsicle (sugared not artificially sweetened) every 4 hours to see if I could keep it down. When I could eat one without vomiting, wait a full hour and drink 1/2 cup of cool, bland soup. If that stayed down, eat more a half hour later and slowly return to eating normally.

I freeze the most ginger-y gingerale I can find in paper cups and always have some in the freezer.

The Angostura bitters and a small amount of sugar get added to club soda to drink anytime my stomach starts to get uneasy. That was a writer's suggestion from a trip abroad. Europeans rely on 'bitters' to help calm cranky tummies a lot I infer.