Give your old boxes and bags a second life by adding sturdy wire handles. Use...

https://archerssplendidcolumn.hexaforgey.com/posts/2-mm-vs-3-mm-wire-for-diy-handles-which-one-bends-easier

Give your old boxes and bags a second life by adding sturdy wire handles. Use 2-3 mm galvanized wire for strength and rust resistance. Drill 3-3.5 mm holes to easily thread the wire through without tearing the material