Design Toilet Seat

toilet seat
Toilet seats are detachable, ringlike seats of plastic hinged to the top of a toilet bowl. They should be cleaned and disinfected daily using proper disinfectant-cleaner to prevent the spread of germs. Some toilet seats have a lid attached and others do not.
(Toilet Seats) Most toilets do not include a seat. They are available for round or elongated shaped bowls, regular or contoured for more comfortable seating. They also come in many finishes such as wood, molded composition, cushioned vinyl, plastic or polypropylene.
the hinged seat on a toilet

design
Decide upon the look and functioning of (a building, garment, or other object), typically by making a detailed drawing of it
the act of working out the form of something (as by making a sketch or outline or plan); "he contributed to the design of a new instrument"
an arrangement scheme; "the awkward design of the keyboard made operation difficult"; "it was an excellent design for living"; "a plan for seating guests"
Do or plan (something) with a specific purpose or intention in mind
plan: make or work out a plan for; devise; "They contrived to murder their boss"; "design a new sales strategy"; "plan an attack"