The reason they use those "vials" is that they are purely and simply the PET blanks that get blown into various bottles like Coke. I can imagine the scenario early on in White Labs' career.
Hey Chris, wadda we going to pack the sheeeyut in - bottles or something, or sachets?
Hey I've got Cousin Hiram workin at that PET blanks place in Topeka and I've seen them little suckas, they even come with a cap already on. I'll get Hiram to pocket a few and I'll drive over during the holidays.
Legendary, Chris, sounds like the good sheeeyut, hey toss uz one of them Bud Lights. Chugalug.