Down here you can buy a guaranteed grain-fed heaven-on-hooves, cut and wrapped to your specs. No problem. As stated earlier by the eloquent one known as The Edge, it walks in one end and comes out wrapped and ready to go on the other end. I do realize these are small businesses and not available everywhere, but when I cut into it I know its prime. Thass all I got.
But as for (Prime) highballs, I certainly know the scoop. It is blended whiskey (Canadian Mist, Canadian Club, Crown Royal, Seagrams Seven), not straight bourbon nor sour mash. It’s ginger ale, not 7-up, sprite, nor fresca or ( For the love of all we hold dear!) Mountain Dew. Some places know the difference and may not have a gingerale button on the soda gun, so they do Sprite with a splash of Coke. That makes it no longer "Prime" but "Choice".
Hope I cleared the murky highball waters. [:O)]