"Late in summer, glorious canned goods like dilly beans are up for judging at county fairs and are sold at every farmers’ market. Some traditionalists would say that dilly beans are best after a month or so of marinating, but you can get that long-marinated taste in just one day with this quick technique. Any type of green bean can be turned into dilly beans, but super-thin, French-style beans stay tender and are less likely to be stringy or tough." States these will keep for up to 1 month in the fridge. Recipe from Eatingwell.com.