Twine is used for its durability and ability to hold weight, so it's associated with strength and reliability in contexts. Make sure you use twine for the heavy boxes; it won't break.
Pro Tip 2/3
Crafting Usage
Twine is also popular in crafts for its rustic aesthetic and functionality. She wrapped the gift with twine for a charming, handmade look.
Pro Tip 3/3
Not Just String
Twine differs from regular string; it's thicker and used for jobs where more strength is needed. Don't use sewing thread; you'll need twine to hold these parts together.