This is a really old Blue Willow milk pitcher that dates from the early 20th century. It is nice to find this squatty shaped pitcher. The rich cobalt glaze is what makes this piece so special. It is not heavily crazed from age but was made with this special crackle effect glaze. 
 
The pitcher is not signed but I believe it is probably Buffalo pottery pattern. The condition of this piece is also very excellent as there are no chips, cracks, or repairs. It is pristine clean inside and out as well. It measures 4" tall x 6" wide handle to lip.