"Nepenthes rajah", like most species in the genus, produces two distinct types of traps. "Lower" or "terrestrial" pitchers are the most common. These are very large, richly coloured, and ovoid in shape. In lower pitchers, the tendril attachment occurs at the front of the pitcher cup relative to the peristome and wings. Exceptional specimens may be more than 40 cm in length and hold 3.5 litres of water and in excess of 2.5 litres of digestive fluid, although most do not exceed 200 ml.