Abstract Spiral. one of the most well-known functional patterns in nature that can be observed in structures such as the proboscis of lepidoptera and snail shells or as vortices forming in flowing fluids. has long served as a source of inspiration for humans in the creation of numerous spiral-based designs. Double-spiral is a design derived from spirals. https://parisnaturalfoodes.shop/product-category/bcaa-glutamine-tropical-punch/