Smooth and Slick by California Exotics is a good water-based lube. It's okay for sex, as it doesn't become flaky or too sticky, but I had to reapply a few times. If used generously, it can be used for anal play, too. I like it a lot to use with my toys, which is why I got it. I'd recommend this because you get a ton of lube for a very low price.