Give your reclaimed boxes and bags a sturdy upgrade by adding wire handles. Use...

https://www.oscarbookmarks.win/upgrade-your-old-boxes-and-gift-bags-with-simple-wire-handles-for-stronger

Give your reclaimed boxes and bags a sturdy upgrade by adding wire handles. Use 2-3 mm galvanized wire for strength and thread it through 3-3.5 mm holes drilled near the edges