There are many scams out there. About the only one I know, that really works, is that shrinking garden water hose. Much to my amazement, it really does work.
I got one of those from the "As Seen on TV" aisle at Walgreens and it works for me. Very lightweight and curls up well so you don't have trip-able hoses all over the place.
I like it and I like Walgreens "As seen on TV" aisle!