ThermoServ Vintage Flambeau Ducks & Geese Double Wall Mugs Set of 4

Flambeau brown and white plastic double walled coffee mugs/cups with duck and geese designs by the artist LeBlanc. One mug has Blue-Winged Teal ducks, one has Pintail ducks, and the last one has Canada Geese. They are all in good used condition… the Canada Geese mug has some white residue on the inside wall of the mug, but it does not appear to touch the design. All of the mugs have some minor scuff marks and scratches (I did my best to get pictures of all of them). The insides of the mugs also have some minor scratches and appear clean. Measurements: 4 1/2” long by 3 1/5” wide by 3 1/2” tall