Sutil Babeland Base: Water Price per ounce: $9 This is basically the holy grail of lubes and also, in my humble opinion, simply the best water-based lube around for a number of reasons.
Cavanah and others who sell them recommend silicone dildos and vibrators ... water-based lubricants K-Y jelly and AstroGlide. Cavanah says that of the two, AstroGlide is the best choice.