Glass Bottle Cutting- soak a piece of yarn in nail polish remover, tie around bottle, light with a lighter, let burn all the way around for about 10-15 seconds then dip in bowl of cold water perfect spilt every time.
A lady at the post office taught me this trick and I have realized very few people know about it! You can turn a flat rate envelope into a pouch to increase the capacity. It holds more than a small flat rate box ($5.80) and about as much as a medium ($12.35) for only $5.60. So worth it! I do this all the time! Just fold the bottom both ways, and flatten it out from the inside, folding the corners and taping them up into a rectangular bottom. Secure with lots of tape. Happy shipping!