Rhinopaq is an innovative app extension designed for Shopify stores, offering a sustainable alternative to traditional shipping. It allows merchants to add reusable rhinopaq packaging as an optional product in the shopping cart. Customers are given the choice between single-use and multi-use packaging through a convenient pop-up feature. Utilizing smart rhinopaq technology, the app ensures that the reusable option is only presented when the cart items fit within the rhinopaq dimensions. This functionality not only supports environmental efforts but also involves customers in the decision-making process for a greener shipping option. Additionally, the app provides customization options for the pop-up design, allowing merchants to tailor the appearance to match their branding. Free setup support is included, ensuring a seamless integration experience for store owners.