Sliced cucumbers pickled after being immersed in vinegar and kept for a few weeks in the fridge. The quantity of vinegar used and the storage circumstances determine how long they will last precisely. In general, sliced vinegar-soaked cucumbers can be kept in the fridge for up to a month if they are kept in an airtight receptacle. Cucumbers may, however, lose some of their crispness and shift in flavor as well as texture over time. For the best taste and texture, pickled cucumbers should be consumed within a few weeks.