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

https://blogfreely.net/rothesqlmw/how-much-weight-can-3-mm-galvanized-wire-actually-hold

Give your reclaimed boxes and bags a sturdy upgrade by adding wire handles. Use 2-3 mm galvanized wire for strength and drill 3-3.5 mm holes to thread the wire through easily