Give your reclaimed boxes and bags a sturdy upgrade with simple wire handles....

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

Give your reclaimed boxes and bags a sturdy upgrade with simple wire handles. Use 2-3 mm galvanized wire—strong enough to hold heavy items but easy to bend. Drill 3-3.5 mm holes to thread the wire through and twist to secure