True, but in her use case this is the best that can be done. Not everyone has mammoth ammount of capital to initially invest and especially if the products are of multiple sizes, how may custom sizes will you order? Considering there's a MOQ of atleast 300 for customs?
Bhajanlal Greenery 150 GSM Packing Cardboard Corrugated Roll (Brown, 10 M X 24 Inch) amzn.eu/d/gI9QRAV This is the link for the corrugated sheet from amazon