We are continually looking for the perfect quality, and we strive to ensure that our bags are as suitable as possible for each type of trip. There are a number of things to consider, which are the ambient temperature, the actual temperature of the medication, and the conditions of use. What interests us is the temperature of the medication itself (and not that of the air around it). The necessary equipment: 1) Syringes and vials filled with water 2) Temperature logger (we use a thermocouple logger, with 8 individual temperature probes) 3) A temperature-controlled black box that will keep the tested bag at a constant temperature. We try to reproduce as much as possible normal conditions of use. We first fill the syringes, pens and vials with water and place them in a kitchen refrigerator so that they are between 2 and 8 ° C. We then prepare the bag by placing the gel packs in a -18 ° C freezer for at least 14 hours (-18 ° C is the temperature of a standard household freezer). We insert the temperature probes inside the syringes, pens and vials filled with water so that they are inside the liquid and measure the temperature of the liquid itself. The temperature probes are linked to the temperature controller, which is linked to a computer that records the temperature every minute. The vials / syringes / pens are then placed in the MedActiv bag, with the frozen gel packs in the correct position. The bag is then placed in a temperature-controlled environment (black box) maintained at a constant temperature of 24.2 ° C. The computer then records the temperature every minute over 12, 24 or 36 hours, depending on the bag tested.