Hard to say for sure without some more mature pitchers but if it came from a non specialized source it it most likely a ventrata, ventricosa, or miranda. Some general care for nepenthes is to make sure they get at least a few hours of direct sun every day and are kept moist without keeping them constantly standing in water. Humidity should be above at least 30% for consistent pitchers. Pitchering is determined by light, temperature, and then humidity. The factors are listed in terms of overall importance.