Two corked seventeenth-century wine bottles, one found on a wreck off the coast of the Netherlands, the other in the foundation of a demolished house in England, have yielded strikingly different contents: a rare example of 350-year-old Portuguese wine, and a putrid concoction of urine and hair designed to harm witches who cast spells.There are a large number of apotropaic deposits on show in the Museum of Witchcraft in Boscastle, including a witch-bottle with urine in it. The Archaeology article claims that this is the first time that it has been definitely proven that witch-bottles contained urine. As most of the Museum of Witchcraft ones were found in walls and so on, that can't be the case, surely? (Unless amateur finds don't count...)
There's also a website devoted entirely to apotropaic objects, including shoes, dead cats, horse skulls, apotropaic marks (which I have written about before), written charms and witch-bottles.