After college, Eisenstadt operated a cafeteria across from the
Brooklyn Navy Yard. He switched to making
tea bags after his cafeteria business declined. In the mid 1940s he invented the
sugar packet, packaged single servings of table sugar, to utilize his tea bag machinery. He proposed the idea to the major sugar producers, but was unsuccessful in attracting their interest. Since he had not secured a patent before shopping the idea around, sugar producers were then free to use his idea without paying royalties, and they did so. In 1957 he came up with a formula for a powdered
saccharin sweetener. Previously saccharin was sold as liquid drops, or tiny tablets. He mixed the saccharin with
dextrose to bulk it up to a teaspoon sized portion, added
cream of tartar, and
calcium silicate as
anti-caking agents. His Cumberland Packing Corporation marketed the product, called Sweet'N Low, in bright pink packets so that the saccharin packets would not be confused with sugar packets at restaurants. His company was also the first to package
soy sauce and other single serving condiments. After the Cumberland Packing Corporation was on a financially successful footing, Eisenstadt devoted a part of his wealth to medical philanthropy. He became
chairman of the board of the foundation for
Maimonides Medical Center. During his 20-year tenure as a trustee and benefactor of this institution, he also served as secretary, and vice chairman of the board. ==Death==