Black zip pouch containing glucose meter, lost near Grassmarket

Yesterday around 3pm I lost a small black zip pouch that holds my glucose meter somewhere around Grassmarket in Edinburgh. The meter inside is white with a faint crack in the corner, and there's a red stripe along the pouch's zipper. It's essential for my daily monitoring, so I'm really worried about it and would like it back as soon as possible. If someone found it, dropping it off at the Grassmarket Information Centre or a nearby medical clinic would help a lot.