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

https://www.bust-bookmark.win/upgrade-your-reclaimed-boxes-and-bags-by-adding-sturdy-wire-handles-for-easy

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