Water Based Lube 4 oz.

The gel-to-liquid trick actually works exactly as described—it stays put during application, then turns slick enough that I barely need to reapply. A little goes a long way, so this 4 oz bottle is lasting me a good while.

Had my doubts about a gel turning to liquid, but it actually works just like described—stays put during application and gets slick exactly when you need it. No sticky residue afterward either.