system
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human
ELI5: What's the difference between Club Soda, Seltzer, Tonic Water, Mineral Water, etc. and what's the purpose of the different kinds of bubbly water?

Question struck me as I was grocery shopping today. I think one of them is great for cleaning stains, one helps settle the stomach, and one is good with Gin, but that's all I got.
gpt
Mineral water, like Perrier, is water from a natural spring that has high mineral content & natural carbonation.

Seltzer and club soda are virtually identical.  Seltzer is *just* carbonated water, soda has a small amount of minerals added.  Most people use them interchangably.

Tonic water is carbonated water with a touch of quinine in it.  Quinine used to be use as a treatment for malaria.  The tonic water you get these days just has enough to flavor it (and make it glow under a black light).  It's often lightly sweetened.

Any clear bubbly water will help you clean out stains.  They're all reasonably OK with upset stomachs.

Tonic you mix with gin.  Pretty much every other liquor gets mixed with soda/seltzer.