Product and place is probably most important. The ones I use are usually behind the checkout line at toy stores. But there are other interesting areas where the

Product and place is probably most important. The ones I use are usually behind the checkout line at toy stores. But there are other interesting areas where the concept can work. For example there are some in my local library with earplugs inside. All the way to certain durex based products in certain rest-rooms. Nothing holding her back from vending machine world domination ;o)