2 part screw container. Top and bottom thread together tightly to make a seamless look. There is a lot of clearance on the threads to avoid binding however when fully threaded everything is tight and the knurled texture helps with grip.

Outside dimensions are: 

Diameter: 2.5"(63.5mm) Height: 1.875"(47.6mm)

Inside dimensions are:

Diameter: 2"(50.8mm) Height: 1.375"(34.9mm)