Crab pots are rigid boxlike traps made of hexagonal or square wire mesh. A multipart installation features a complex display of framed images punctuated by boxlike plywood modules. This boxlike, utilitarian shape became the prototype of shuttles throughout "Star Trek". A Worthington feedwater heater was installed, with a boxlike mixing chamber behind the stack. It was heavy and boxlike, with short legs, and abundant decoration of gilded bronze. Koubek defended his work from criticisms that it was boxlike, sterile, repetitive, and dull. The "kempli" and "kajar" are small kettles set over cords strung on a boxlike stand. The ride is safe but uncomfortable, the carriages being small and boxlike. Structurally, the endocranium consists of a boxlike shape, open at the top.