A water-based lube, made in the UK which uses
propylene glycol in place of
the more commonly used
glycerine. While the
flavor of propylene glycol is a
little strong, it's advantage is that it does not encourage
yeast infection
in the way that glycerine is prone to do.
Liquid Silk also includes a small amount of silicone oil, another very good
lube for sex play. Their original label noted that it was condom-safe, FDA disallowed that statement, however to my knowlege it is safe to use with latex.
The presence of silicone oil, however suggests that if you use it with silicone
rubber dildos consider using a condom over the toy (a good idea in its own
right).