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

https://sirachapete736.gumroad.com/p/why-does-thicker-than-3-5-mm-wire-feel-impossible-to-bend

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