This jar for olives was made by the French ceramist Marie Christine Treinen in the 1960's in Vallauris, France. The picture is showing a lighter colour than in reality. It has the very characteristic turquoise colour that she worked with. 
 
Vallauris Pottery was produced in the town Vallauris Golfe Juan situated of the French Riviera near Antibes. Thanks to a clay deposits nearby, it is known as the "city of 100 potters". It is thought to have been famous for it’s pottery all the way back to the roman times, but a pandemic put a stop to its success for a while, only to be continued in the 16th century. 
The twentieth century brings it’s modernization to Vallauris and the activity of the artisanal pottery in the city declines, but in 1948 Pablo Picasso starts to live and work in Vallauris and gives a new impetus to the pottery of Vallauris. The development from ceramics being purely utilitarian, now develops into ceramics becoming art. This attracted many other brilliant artists to the city, including Henri Matisse, Victor Brauner, and Marc Chagall. During the next 25 years, a lot of important work is produced in Vallauris, which is still admired and praised up till this day, for it’s often intriguing, innovative and interesting shapes and glaze.