Custom packaging sleeves allow you to tailor your product for special occasions, including seasonal themes. In fact, designing containers for each season offers several benefits to beverage companies. While it may seem like a lot of initial work, the results are well worth the investment. What Is Seasonal Packaging? As you may have guessed, seasonal packaging is packaging designed with a specific season in mind. What that means varies by audience. For example, many Americans associate spring with Easter. In contrast, spring is closely associated with cherry blossoms in Japan, as picnicking beneath the blooming trees is a cultural tradition.