1.   Commercials come at them from grocery store floors, from airport baggage carousels, even from walls above urinals.

2.   Companies already print advertising slogans on beach sand, supermarket receipts, airport baggage carousels, phone booths, and even the little stickers on fruit.

3.   Some airlines also offer them overnight delivery of award tickets, priority baggage delivery to airport carousels, and access to airport clubs.

4.   The sameness of the bags sliding past on the airport carousel creates errors and confusion.