Le Sablier fragrance diffuser, by Diptique.

Diptyque introduces a new way to perfume your home with an hourglass shaped fragrance diffuser. The famous 34 Boulevard Saint Germain fragrance drips from one glass bulb to another for twenty minutes releasing its scent in the room. The Sablier container, designed by studio R’Pure, is a simple, timeless shaped object that emphasizes its functionality and reaches for the Hall of Glam sky.

Source: http://www.diptyqueparis.fr