I used to keep bottles, but they just took up way too much room - so now I have a bucket on top of the beer fridge that I toss a cap in. One day I might organize them according to color and make a mosaic mural with a beer-related image
(my Starr bottle opener puts only a small dimple in the middle of the cap, so I won't even have to straighten them out!)
"We are here to drink beer. We are here to kill war. We are here to laugh at the odds and live our lives so well that Death will tremble to take us."
-- Charles Bukowski