10. Thighmaster (Total Sales $100M)
Half of all the products on this list are fitness-related in some form or another. There’s nothing like sitting on a couch to make you feel like you’re being lazy, and should order a fitness product to keep you in shape. The beauty of the Thighmaster was that you could stay on your couch and use it, as it required you to be sitting most of the time anyway. This was the grandfather of many home fitness products, many of which you will see on this list coming up.
[Photo via UBC]