Give your reclaimed boxes and bags an upgrade with sturdy wire handles. Use 2-3...

https://claytoncllo171.tearosediner.net/how-do-i-bend-wire-handles-so-they-do-not-hurt-my-hands

Give your reclaimed boxes and bags an upgrade with sturdy wire handles. Use 2-3 mm galvanized wire for strength and durability. Drill 3-3.5 mm holes to thread the wire securely