A DipJar, an electronic version of the tip jar found in coffee shops, is seen on the counter of an Oren's Daily Roast in New York. With a quick dip of their credit cards into the sleek machine, grateful customers are able to leave a pre-set tip (generally $1) for baristas. DipJar, a tip jar that takes plastic, located in six stores, is just one high-tech innovation seeking to make up for declining gratuities as people pay for small purchases with credit or debit cards. - Reuters/Carlo Allegri