The present invention relates to a personal use device, preferably a toothbrush, a shaving device, or a hair removal device. The invention relates to a refill pack for such a personal use device, having a supply container (2), particularly a supply bag, containing at least one hygiene or care substance such as toothpaste or the like, and a pump (3) tightly connected to the supply container, the pump chamber of which is connected to the interior (6) of the supply container via an input valve (5). By deformation of a membrane which bounds the pump chamber (7), the pump chamber volume can be changed. The invention also relates to a method for filling such a refill pack.