If you have a bunch of plain envelopes at home and don't want to spend a ton of money on fancy ones, try decorating them ...
You can can even make coordinating envelopes. Just use leftover scrapbook paper or any decorative paper you have at home.
No, I admit, but there's always a first. Could someone even make their own envelopes? The inspiration to hold a workshop at my local library on folding red envelopes - known as hongbao in Mandarin ...