Portal 2 Aperture Laboratories Black Mug This Aperture Labs certified hot beverage consumption receptacle has been tested for your enjoyment and safety. Should you decide to purchase and use the Portal 2 Aperture Laboratories Black Mug, know that the many who perished in the testing phase were happy to be of service in the field of scalding fluid encapsulation. The Portal 2 Aperture Laboratories Black Mug can hold 8 ounces of liquid.