Stein

google

ref

mid 19th century: from German Stein, literally ‘stone’.

wiktionary

ref

From a regional use [1] of German Stein(“stone”). Probably a clipping of Steingut(“stoneware”) or Steinkrug(“stone pitcher”). Compare Old English stǣna(“stone jug, a pot of stone or earth”). Doublet of stone. More at stean.

etymonline

ref

stein (n.)

earthenware mug, 1855, from German Stein, shortened form of Steinkrug "stone jug," from Stein "stone" (see stone (n.)) + Krug "jug, jar." Compare Old English stæne "pitcher, jug."