I was told the same thing, Anna. I started rooting this plant in mid-summer and it has never had anything but tap water. I will syringe a bit of rain water into the pitcher.
Elaine/Anna, when the "lid" begins to open, will it open fully? Mine only has the lid open perhaps 1/3. Also, does an opening lid indicate the pitcher is as large as its going to be? The pitcher is about 3 3/4" long.