Winter squash, members of the Cucurbitaceae family and relatives of both the melon and the cucumber, come in many different varieties. While each type varies in shape, color, size and flavor, they all share some common characteristics. Their shells are hard and difficult to pierce, enabling them to have long storage periods between one and six months. Their flesh is mildly sweet in flavor and finely grained in texture. Additionally, all have seed-containing hollow inner cavities.