It is "Bucketless," not "rinseless." You still need to wet the car first, and rinse it afterwards. Basically just a different way of applying the soap. Lets you "get it where you need it" for a bit of dwell time, I suppose. Personally, I feel that you should clean out your mitt a few times during a wash. The only way you'll do that without a bucket is to spray it out with the hose, which may well cause more of a wet mess around the area than dipping it in a bucket. (Although spraying the mitt clean is handy for cleaning fairly dirty cars.) I got a bottle "just for to have," but after 1 or 2 uses, I haven't bothered to use it since.