Receptacles

Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles and the point where they exit from the apparatus.

Maria Montessori invented the sorting box after observing that children enjoy fitting objects through receptacles of a similar shape.

Paris has turned to open-air street urinals, called "uritrottoirs" and "pavement urinals," which are similar to planters with an opening in the front and a floral display on top. The receptacles contain straw, which transforms into compost for later use in parks and gardens.