This $22 bicycle beer holder comfortably keeps a 6-pack of beer bottles right below your nuts. No word what to do if you're more of a 18-pack a day kinda guy, but my guess is get a basket. Alternatively, buy six-packs of cans, which come with their own plastic bike-mounts.
Donkey 6 Pack Bike Bag Great bike accessory by Donkey Products, the Donkey 6pack/Bike bag is a saddle bag with six compartments for carrying up to six 0,5l bottles; The bag is made of dark grey canvas with black velcro and neon orange coated. It measures 26x29x18 cm.