Mormon tea / ephedrine is not commonly consumed and as far as I know it isn't consumed at all by LDS faithful. It's just a silly colloquial name for a plant.

But, due to a lot of retroactive canon gymnastics, cold caffeinated beverages like soda are consumed in great quantities by Mormons. Actually, under the latest "official" stance, tea made from the "mormon tea" plant would actually be banned, as it's a "hot beverage" with mental effects.

Mormon tea is merely the folk name of a plant, it doesn’t mean they all drink tea made from it.