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 beer tankard 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.