There's a frood who really knows where his towel is.
 
A Towel Day special, based on a linocut print featuring the words "Don't Panic" printed onto pages of the Hitchhiker's Guide to the Galaxy (HHG2G) by Douglas Adams, which chronicles the adventures of Arthur Dent and Ford Prefect as they struggle to find the answer to "Life the Universe and Everything" 
 
Set of four badges