A classic that still gets laughs. This Popkiller original design is printed with "Japan Sells Beer to Kids, I Have Proof!" along with an image of a vintage Kirin ad, though it is for a sparkling lemonade beverage (but we'll just keep that between me and you).
Translation (from top):
papa wa biiru
Beer for Dad
mama wa jyu-su
juice for Mom
bokutachi wa Kirin Lemon
and for us, Kirin Lemon