Materials I used for this project: Varies bottle Cap colors (Friends, family and local pubs) Tile mortar and Unsanded black grout (Lowes) Commercial strength urethane (Amazon) 1) We hated the musky carpet in the office / craft room, So, rather than buy a normal floor covering, I decided to challenge myself. I began collecting beer / soda bottle caps from friends and family across country as well as circulating a picture of my project to local pubs. It took over a year to complete because I waited for people to drink the right colors.