MEDALTA POTTERIES STONEWARE CUP
A stoneware cup, holds 5 ozs., fired on the wiped basal ring, rolled rim and base with 14 vertically grooved panels running from top to bottom, straight sided, expanding towards the top, a 7-shaped handle, off-white exterior with a brownish-pink wash around the rim and tan interior. Stamped "MADE BY MEDALTA, REDCLIFF, ALBERTA.
Size: 3 x 4 x 3 in.

This is a Medalta ’66 piece.

“Medalta Potteries (1966) Limited” operated in Redcliff, AB from 1966 to 1986. 

Visit this link for more information about the Redcliff factory.