This is an English transferware advertising mug for toothpaste. The black transfer on the front reads Burgoyne, Burbidces & Cos, Cherry Tooth Paste, For Preserving & Beautifying The Teeth. There are two marks on the bottom, made in England and the numbers 7046. Today you could use this black and white mug to hold your tooth brush.

H 4.5 in. x W 5 in. x D 2.5 in.
H 11.43 cm x W 12.7 cm x D 6.35 cm