Drawstring bags are really easy to make, and are great for popping a gift in, without the need to use paper and tape.

Lots of preloved items are great to use, such as napkins, tablecoths, traycloths, cushion covers.

Easy anough to make a channel with lace or tape, or turn top over and maybe add a button hole.

Here are a few youtube videos on quick and easy ways to make them.  Don't forget a really thick fabric may not gather as well.