Any paste lube that preferably doesn't have water listed as the first ingredient.
Vaseline is good but greasy, Bag Balm, Udder Cream are variants. Bike specific stuff is available such as Chamois butter, Bodyglide and several others. You want at least a noxzema consistency cream, not liquid as it will last longer and to stay away from lubes with water in the first or second position as listed ingredient. They don't last long enough.
Steve