Silicone lubes retain their lubrication better and longer than water based lubricants and are highly concentrated so a little goes a very long way. The king of all lubricants! ID Millennium is a 100% pure grade silicone lubricant. Perfect for massage and as they are not water based will even work under water making them ideal for use in the bath, shower or hot tub etc. Remember, do not use a silicone lube with any silicone toys!