I buy them in two's when i go to the shop, as soon as they both run out i just go to the shop (co-op, off licence etc.) i always buy 2, and every time i do it, the person behind the counter says "2? are you sure you don't mean 1?" like i'm some kind of idiot lol
Last time i went i bought 4, 1 of each that they had and i got such a funny look