I discovered by accident that an old t-shirt can provide some basic cordage if you tear strips off it. The back of the t-shirt is the longest (and likely least worn) part, so if you snip through the hem at about 1” (2.5cm) width then tear the full length, the edges will roll in to the centre, and you can further encourage this by slowly pulling it through one hand (light grip) with the other.
Assuming a 100% cotton t-shirt, you’ve got a bio-degradable binding for rubbish or to loosely tie back tender plants. Or where you are anxious to avoid surface damage. Being soft and stretchy, any knots worked tight are likely to be permanent.