Looks a lot like a Sylvia Stave stainless steel cocktail shaker (or knockoff thereof) that has been painted white to avoid nasty reflections of the camera and crew.
Background on the original Sylvia Stave Cocktail Shaker design:
Sylvia Stave, born in Sweden, in Växjö, in 1908, worked as a silversmith in Stockholm and Paris. In 1929 she began collaborating as a designer, and soon enough as a design manager, with C. G. Hallberg Guldsmeds A.B. In 1937 she moved to Paris, where she won an award at the World Exhibition. After a brief return to her native country to design the Hallberg collection in 1939, she moved definitively to Paris in 1940. Made under licence from the Bauhaus-Archiv in Berlin. Presented for the first time in the Officina Alessi catalogue in 1989 after four years of work and research, this piece was originally attributed to Marianne Brandt by the authoritative Bruckmann’s Silber Lexicon which published its photo, assigned it to the Dessau Bauhaus and dated it to around 1925. But the shaker was subsequently re-attributed: research carried out in 1994 by the director of the Bauhaus Archiv, Peter Hahn, discovered that its designer was in actual fact Sylvia Stave from Sweden. A photo very like this shaker was published in the 1937 catalogue of a Swedish maker, C.G. Hallbergs of Stockholm. Designed by: Stave Sylvia Features: -Material: 18/10 Stainless steel mirror polished. -Capacity: 34 ounces. -Overall dimensions: 7.09" H x 5.43" Dia.