Caperberries are different from capers. While the both come from the same plant they are most definitely not the same thing. Capers are the buds from which the caper flower grows. From that flow the berries - caperberries - form. And while they come from the same plant they have a very different texture and flavor. Caperberries are preserved with the stem, allowing a crunchier texture. Flavorwise, the caperberry is milder than the caper, but can be used in a similar fashion.
While capers are excellent cooked to add flavor to dishes, caperberries are usually seen as part of charcuterie and cheese boards, imparting extra flavor and contrasting textures. Caperberries also work excellently as part of sauces, such as tartar sauce, though not as effective as capers. Due to the milder nature of caperberries, they are usually enjoyed fresh. One use for caperberries is in lieu of olives for a delicious martini. The flavor and saltiness of a caperberry is the perfect replacement for olives in this epic, and traditional cocktail.
Store your tin/jar in a cool, dark, and dry pantry. Store in fridge once opened.