Abstract: Embodiments of the present disclosure generally relate to apparatuses for sampling bodily fluids and methods of fabrication thereof. The apparatus includes at least one adhesive patch, at least one bodily fluid port attached to the adhesive patch, and at least one bodily fluid storing capillary connected to the bodily fluid port and attached to the adhesive patch. The adhesive patch may be adhered to a subject's skin, the input port may then be connected to a source of bodily fluids and the one or more bodily fluid storing capillaries function to draw in the bodily fluid over time and store it for later analyzation. The one or more bodily fluid storing capillaries may be formed by imprint lithography on a plastic or glass substrate.