A tankard is the Fremennik equivalent of a beer glass. Players are unable to make them, however they may be picked up from the tankard respawn point in the Rellekka longhall.
Players can buy a tankard of beer from Thora the Barkeep in the Rellekka longhall for 26 coins. Drinking the tankard of beer leaves an empty tankard, and causes the usual beer effects to players. Just with beer glasses, if a player uses a tankard on a barrel with a tap on it, and the examine info says "It's got ale in it", they will get free beer.
This information has been compiled as part of the update history project. Some updates may not be included - see here for how to help out!