What is a name for a clay tobacco pipe?

I've seen them refered to as "tavern pipes." Supposedly they were kept in the tavern as a kind of community pipe. Patrons could use one of these pipes and then break off a piece of the stem before returning it to the rack. I've also heard that this is not the reason for the long stem, rather it is for the same purpose as a briar churchwarden style pipe. Which is of course a cooler smoking pipe.