Pitcher plant
The pitcher of the pitcher plant is actually a modified leaf. The apex of the leaf is always the lid. Pitcher plants catch (get) insects in a cup of liquid. The walls of the cup make nectar (sweet liquid). The nectar attracts insects. When an insect lands on the wall, it falls down into the liquid. The insect cannot get out of the cup because the walls are smooth and slippery and the walls have hairs pointing down.