No, not a euphemism for how many of us were fed in our infancy... But real milk bags! So, this commodity doesn't always come in jugs or glass bottles apparently (man, the double entendres are flying today) and except for a select few boutiques convenience stores in the Midwest, it's only available in countries like Canada and Great Britain... I guess there was some concern that milk jugs were not getting recycled so the bags became wildly popular. Doesn't seem all that efficient from a user standpoint but, anyway here's more.