Give your reclaimed boxes and bags a sturdy upgrade with simple wire handles....

https://kylerscoolblogs.novacrestiq.com/posts/how-do-i-finish-a-wire-handle-wrap-so-it-does-not-unravel

Give your reclaimed boxes and bags a sturdy upgrade with simple wire handles. Just thread 2-3 mm galvanized wire through 3-3.5 mm holes drilled near the edges. This adds a solid grip that holds up better over time