There appears to be some confusion about the ampullaria varieties. Cultivar names like 'Hot Lips' applies only to one plant, in this case Malesiana's cultivar. A true cultivar can only be propagated by vegetative methods-cuttings or mericloning. This is why it is offered for sale only from cuttings (until someone successfully mericlones it). Other plants of similar color are not 'Hot Lips', they just resemble 'hotlips'. The same applies to N. ampullaria 'William's Red'. You may find other totally red plants that look like Williams Red, but they are not. If there is any way to distinguish that they are different (growth habit, leaf shape, gender etc), then they cannot have the same name.The good news: if you find something unique, bring it into cultivation and can propagate it-establish cuttings-then it can be given a cultivar name. To make it official, the cultivar should be described and published in an appropriate journal or book. I don't think Hot Lips was ever described officially, but the name has become famous among Nepenthes growers. Otherwise, for the horticulturist, the best way to describe these plants is based on color variation: green pitcher with red peristome, red pitcher with yellow peristome, solid dark red pitcher and peristome, green with red and purple spots with brown shaded peristome.
Hope this is helpful.
Trent