I thought I'd share this picture a little more widely than I usually do as understand these do not occur very often.
I was a bit disappointed about the size. A rather minuscule 1" or so. The plant is a N. ampullaria from Wistuba (Tayeve form) and has been under some stress for about three months or so as it adjusts to a new enclosure. The plant is ~6-8 years of age.