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

https://mariossuperbchat.wordcanopy.com/posts/what-is-the-best-way-to-reinforce-a-handle-hole-on-a-paper-bag

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