Are the 500ml bottles of bath soak in glass or plastic bottles? Can't see any reference to it on the page and don't want to order without knowing. Links here [[https://www.thewhitecompany.com/uk/Nourish-Bath-Soak/p/SNDBS?swatch=No%20Colour nourish bath soak]] and [[https://www.thewhitecompany.com/uk/Spa-Restore-Muscle-Soak/p/A03649?swatch=No%20Colour spa restore muscle soak.]] Thanks!