This is also how I got my first scoby. GTS Kombucha is about 3.50/bottle. Now I have 4 gallon sized jars going, all from that one scoby. They grow and multiply pretty quickly when they aren't kept in the fridge.
You can use plastic bottle tops to seal food bags. I have also seen a broom made with 2 liter coke bottles. I can't post links but just type these or similar phrases into google "plastic bottle broom" "plastic bottles to seal food bags"
Here is a simple recipe that I use for deodorant
1/4C baking soda
1/4C cornstarch
5 T coconut oil
Baking soda can be replaced with arrowroot powder if its irritating. Essential oils are optional; some apprpriate for deodorant because of antimicrobial properties are bergamot, tea tree and...