-Baby oil/lotion to slide into my chastity tube without becoming erect (arousing lubes can definitely make getting locked up pretty difficult sometimes!)
-Water based lubes while wearing a silicone butt plug
-Silicone lube while wearing my non-silicone plugs
-Petroleum jelly whenever Mistress decides that I need to sleep plugged.
I am required to keep a couple bottles on hand of various brands. All in all, there are probably about a dozen different brands in our toy box.
Pretty much the only types we absolutely *don't* use are de-sensitizing gels lol