A new and distinct Nepenthes Rafflesiana×sibuyansis cultivar named ‘CANTNEPSUK’ is disclosed, characterized by exceptionally rapid growth. Plants tolerate a broad range of temperature and humidity, and can tolerate roots fully submerged in water. Ornamental pitchers are squat and uniquely dark purple and yellow. Plants form long tendrils. The new variety is a Nepenthes rafflesiana×sibuyansis, normally produced as an ornamental indoor plant.
