Apple drops are a type of hard candy and are a variety of penny candy, which includes cola bottles and jelly beans. Ingredients can vary slightly depending on company and brand, but typically they are made using sugar, glucose syrup, citric acid, E330, natural flavour (often apple juice concentrate), and natural colours E100 and E141.
Apple drops were mainly popular in the UK and Ireland during the 1980s and 1990s, with demand for them sharply dropping after that time. The candy is now usually found only in smaller independent shops, or from larger retailers at an increased price.
References
Apple drops Wikipedia(Text) CC BY-SA