Who likes Seltzer? It may also be called Sparkling Water or even Soda Water in your area? Have you tried to make your own?
It’s carbonated water without additives. Some people may recognize the brand name La Croix. While I cannot do carbonation anymore, I think I’d just stick with herbal teas that are not carbonated.
I like something called Sparkling Ice. It's got a bunch of flavors to it and doesnt taste like your usual soda seltzers or what have you. Fruit Punch is the best one.
