Nepenthes albomarginata looks like it’s going on a date, all dressed up with a classy white collar. The characteristic band of white under the peristome serves a unique purpose, though - and it’s not for attracting the ladies or gents - rather, a specific type of prey.
Known as the "splendid pitcher plant" for good reason. It combines the most beastly characteristics of a flanged, spikey peristome with the handsome refinement of a cylindrical pitcher shape. It's like a lion in a tuxedo - it will bite your face off, but will do it with style.