The silver hip flask was first manufactured during the 18th Century, however examples from this period are quite rare. During the 19th Century the demand for hip flasks increased, with sterling silver examples being the most sought after, although glass and pewter flasks were also manufactured. Most hip flasks are slightly curved to fit snugly to the hip, and have a bayonet cap for ease of use while on the go. Prohibition during the 1920’s saw a large increase in popularity, and they have remained popular ever since, especially as gifts for special birthdays or at weddings.