Good idea, I thought about it some days ago when I was on my way to my training. Since I usually leave my wallet I do not carry to much of stuff that can be used to idenitfy me in case of an accident or such. Might be a good idea to ad some personal information, such as name, date of birth to the PSK in case of accident, death etc in order to help with identification, getting in hold of next of kin etc. A permanent marker to write this information on the inside of the lid could proberbly work.

/Jonas