Contemporary carnival glass Inverted Fan and Feather covered sugar bowl by Summit Art Glass and based off an early 1900s pattern from Dugan/Northwood. The golden iridescence produces strong blue and amethyst hues. The covered sugar has four ball feet and a flared sawtooth rim. The cover or lid with a ball-shaped knob fits on an inside 'shelf'. Inverted Fan and Feather pattern is sometimes called Feather Scroll.
The covered sugar stands about 6 3/4 inches tall with the cover on. The opening of the sugar bowl is about 3 1/2 inch diameter. There are some chips and flakes along the inside rim (shelf) that the lid sits on - see pictures.
Summit Art Glass out of Ohio first produced this line in 1979. At that time, Summit was having other glass makers make their products. This covered sugar is not marked. I am guessing that it had a paper label.