Create a highly detailed, watertight 3D printable coffee mug inspired by a classic horror hockey mask. The mug is cylindrical with a matte black body. Around the rim is thick glossy red dripping liquid that hangs naturally over the edge.

On the front of the mug is a raised white hockey mask with smooth curved edges, ventilation holes, black eye sockets, subtle grey shading, and small red triangular markings. The mask should protrude about 8-12 mm from the mug surface.

The handle is a large chef's knife. The blade is silver with a slightly satin finish, while the handle is black with three silver rivets. The knife is connected securely to the mug as a functional handle with thick supports for strength and 3D printing.

Make the model a single watertight mesh with no floating parts. Ensure all details are embossed or integrated into the mug. The knife handle must be strong enough for FDM printing. Wall thickness should be at least 3 mm, with rounded edges and no overhangs greater than 45 degrees where possible.

Style: realistic, clean hard-surface modelling, high detail, optimized for FDM 3D printing, multicolour friendly, no background, centered model.