Upgrade your reclaimed boxes and bags with sturdy 2-3 mm galvanized wire...

https://sethscoolword.publishlane.com/posts/how-do-i-build-a-simple-storage-system-using-reclaimed-containers

Upgrade your reclaimed boxes and bags with sturdy 2-3 mm galvanized wire handles for a cleaner, stronger grip. Drill 3-3.5 mm holes to thread the wire through easily without damaging your containers