The early 70's- a heady era of trick custom vans, rampant hair growth and do-it-yourself attitude. It was a time when the coolest guy on the block was your Winston-smoking barber, and blow-molding a horizontal handle on a plastic bottle was unhearded of. Today fashions from those days are temporarily back in style, disco music is hip, and "Starsky and Hutch" reruns are cool. But some designs never went out of style. Few objects are as ubiquitous and recognizable as the Prestone Antifreeze bottle, a design that emerged from this same era and has remained virtually unchanged in more than 25 years. Its longevity testifies that innovative design is