OBOWer Esther is headed for a multi-country Euro trip and her sub-20 pound packing list is impressive (from her OBOW forum post:

On the plane:
plane ticket
passport
short sleeved shirt
light jacket
fleece vest
underwear
bra
socks
tilley pants
shoes
hat
lip balm spf 20
cash-€40 (in hidden pocket)

Purse:
Shout wipes
kleenex
baby wipes
business cards

Money belt:
copies of passport, CC, DL, eyeglass prescription
money (euros and pounds)
numbers for CC companies
credit cards

Luggage:
Trip calendar page (hotel list and all necessary details from itinerary)
ibuprofen
rail/bus tickets
hotel/hostel infomation
Lara bars
vitamins-multi
famotidine
power strip
3-2 prong adapter
outlet adapters
digital camera
rechargeable batteries and charger
SD card reader
camera case
Rachel’s book and toy, cards for graduation and wedding
sleepwear (quick dry shirt and shorts)
Packtowl original
Packtowl personal
vegan passport
pocket doctor
long sleeved shirt
travel pants
underwear (2)
bra
socks (2)
Ida’s Ultra soles (shower shoes)
Kiva bag
eyeglass repair kit
eye mask
nylon wash cloth
ear plugs
gmail maps
inflatable pillow
List of embassies
duct tape

Toiletries:
soap/shampoo
conditioner
deodorant
solid perfume
menstrual cup
pads
tooth powder
travel toothbrush
floss
facial cleaner
comb
shower cap
massage bar/moisturizer
pantiliners
sink stopper
travel clothesline
bandages
sunscreen

Liquid bag:
hand sanitizer
anti-itch spray
febreeze anti-microbial

Her level of preparedness puts me to shame!

From her Flickr page:

18 days (including travel)
London, England
Edinburgh, Scotland
Amsterdam, Rotterdam, Den Haag, Netherlands
Paris, France

Talk about his list on the OBOW Forum.