Holo Press manufactures high-quality custom poly shopping bags based on customer specifications; our minimum order quantity is 3,000 pieces. Poly mailer bags are typically chosen for lightweight, nondelicate things because of their low weight and ability to fit in any space. Mailing bags can take on several shapes, unlike corrugated boxes, which have a specific shape and need a specific area. Plastic poly shipping bags are without a doubt the best option for warehouse storage. Where you could only keep one box, you could easily stock up on poly mailer bags.