We call this the “pop up container”. By twisting the base , the nozzle rises up and allows the user to easily access the pump. This cap-less design is truly time saving and very convenient while being really easy to use. The outer shell is one piece and can be molded in any color or sprayed to allow for a uniform and unique look. The screw on top is easy to assemble but once in place cannot be undone thereby preventing any spills.