Hmmm, little saddle bag--spare tube, levers, CO2 cartridges, eye drops, lip balm, bandaids, lanolin wipes (free sample "for breastfeeding moms", but they're great for any chafed parts), great little foldup tool with hex wrenches and two screwdriver tips. Sport beans. Sunscreen stick. Hair thingy. $20 hidden somewhere.

Backpack/Timbuk2: hairbrush, antiperspirant, entire makeup thing (mascara, eye shadow, blush, eye liner, eyebrow pencil--one time I rode to work and forgot to put on any makeup--scary pale ), hair thingies, little first aid kit with everything you can imagine. Gestational age wheel (essential tool for a midwife), pens, reading glasses. If I'm using it to go to work, I'll also throw in wallet, phone, date book, change of clothes, washcloth in a ziplock bag with some Dr. Bonner's soap. Not to forget U-lock and cable. Some sort of treat.

But no beer.