Give your reclaimed boxes and gift bags a sturdy upgrade by adding wire...

https://fionafreshmaids.com/how-do-i-make-wire-handles-look-less-industrial-in-my-living-room/

Give your reclaimed boxes and gift bags a sturdy upgrade by adding wire handles. Use 2-3 mm galvanized wire for strength, threading it through 3-3.5 mm holes that you can easily punch or drill