Scottish witch bottle... what's a fairy bottle?

At the anniversary meeting of the Folklore Society, held to-night, it was stated that the committee have in hand a quantity of Aberdeenshire folklore collected by Dr Gregor, which they hoped to send to press shortly. In Scotland the Society's work in the collection of folklore from printed sources is in progress in Morayshire, Banffshire, Aberdeenshire, Kincardine, and Forfarshire. Some especially interesting examples of folklore objects from Aberdeenshire and Galloway, including a herd's club, a slamp used in farm kitchens, a fairy bottle, a witch bottle, and an old-fashioned reel for winding yarn, collected by Dr Gregor, and recently presented by him to the society, have now been added to the exhibits in the Society's case in the Museum of Archaeology and Ethnology at Cambridge.
The Scotsman, 20th January 1897.