One of the many advantages of learning illustration is the vast number of applications for it. For instance, learning how to draw something as mundane as bathroom sink can allow you to create your own custom designs for home appliances. You can create your own unique bathroom designs. When this is done, you can take the illustration to an interior designer and the can help craft your original sink. The best way to tackle a drawing like this is to break the sink up into simple parts. For the most part, a sink is a bowl and faucet. Get the basic frame down and you can layer your own details on top.
Draw an oval for the bowl of the sink. Make the top part of the oval flat. Draw the guideline for the base with a vertical line extending from the middle of the bottom of the sink.
Add the faucet guideline with curved lines that bends in on itself almost like a reverse and sideways "G." Add the guidelines for the handles with two horizontal lines with circles on both ends. Add a vertical line to both of the handles to attach them to the sink.
Add a trapezoid under the handles for the faucet housing. Make the top line smaller than the bottom line. Add a oval inside the bowl that is parallel with the shape of the bowl. Add a curved line to the bottom of the bowl. Add parallel lines on the right and left sides of the base guidelines. Add a horizontal line at the bottom of this for the base of the shape.
Add cylinders on top of the handle guidelines. Add a triangle shape above the faucet for a stopper. Erase all the guidelines.
Ink the entire drawing. Let the ink dry and carefully erase the pencil lines.