This is a beautiful piece of vintage Amberina art glass. It is 6-inches tall and 2-inches square (plus applied handle) diamond point pitcher. Amberina glass is made by the addition of gold powder. The dual red and yellow glass is achieved by differential heating of the glass. It was made by the Kanawha Glass Company of West Virginia. The Kanawha Glass Company was in business from 1955 to 1987. This particular piece probably dates to the 1950s.
It was blown in a mold, so the inside of the glass is indented (the bottom inside corners are a bit hard to clean). It has some light wear on the base, but it has has no cracks chips or damage.