The HumaPen Memoir is an insulin delivery implement produced by Eli Lilly and Company. It is a needle-based injector medical drug delivery device that stores in memory a record of the last 16 injections. A similar product by the same manufacturer is the HumaPen Luxura HD, which has no memory function. The pens deliver between 1 and 30 units of insulin in half-unit increments. Insulin pen injectors use short needles to deliver precise insulin doses, and are highly portable. The HumaPen Memoir is an insulin delivery implement produced by Eli Lilly and Company. It is a needle-based injector medical drug delivery device that stores in memory a record of the last 16 injections. A similar product by the same manufacturer is the HumaPen Luxura HD, which has no memory function. The pens deliver between 1 and 30 units of insulin in half-unit increments. Insulin pen injectors use short needles to deliver precise insulin doses, and are highly portable.