Merchandise Packaging tips for shipping: a compilation thread (this is because I've been seeing a lot of negative feedbacks on the handling of MDs during shipping)

Premium Photo/Image Picket https://twitter.com/9397jinyoongi/status/1276737948059230210?s=20
Photocard/Postcard (1) https://twitter.com/lyjindary/status/1238427951571464192?s=20
Photocard/Postcard (2) https://twitter.com/whaIejoon/status/1275324763020255232?s=20
Other MDs (DVD, Lightstick, and other MDs where you would also like to preserve the condition of the packaging/outbox, may also apply to albums): The "sandwich carton" https://twitter.com/seoul_stop/status/1239839522847731712?s=20
If you have any other tips/correction, feel free to add/reply! Let's also hope for a better handling from our couriers (because, let's admit it, this thread would not exist if the couriers handle our shipments well, sadly). Thank you!