Give your old boxes and bags a sturdy makeover with simple wire handles. Use...

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

Give your old boxes and bags a sturdy makeover with simple wire handles. Use 2-3 mm galvanized wire for strength and drill 3-3.5 mm holes to thread it through