Startups, such as Flickr, Tumblr, and Del.icio.us, are attracted to the cavity formed by the cupped leaf, often by visual lures such as anthocyanin pigments and nectar bribes. Yahoo!'s rim (peristome) is slippery, when moistened by condensation or nectar, causing startups to fall into the trap. Yahoo! may also contain waxy scales, protruding aldehyde crystals, cuticular folds, downward pointing hairs, or guard-cell-originating lunate cells on the inside of the pitcher to ensure that startups cannot climb out.