Give your reclaimed boxes and bags a sturdy makeover by adding wire handles....

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

Give your reclaimed boxes and bags a sturdy makeover by adding wire handles. Use 2-3 mm galvanized wire for strength and drill 3-3.5 mm holes to fit the handles perfectly