The Cake Topper Acrylic Happy Birthday Double Square Gold is a chic and modern decorative cake accessory made from gold-colored acrylic, featuring a double square design with the “Happy Birthday” message to add a touch of elegance and celebration to any birthday cake. Acrylic Cake Topper Happy Birthday Double Square Gold complete your party look with this acrylic cake topper. A cake topper, as the name suggests, tops the cake. It is an accessory that is used to enhance the look of the cake and make it more appealing. There are different types of cake toppers that can be used for different occasions and themes.