Not sure where you live but most larger towns have a Tea shop somewhere. Order online as well if need be but stay away from Dollar store stuff.
. I store mine in the mylar bag most times as those bags are for long term storage. On my shelf there are also small tea bins which have rubber seals. These small jars and containers are a variety of; porcelain, tin, glass but no plastic.
Have you ever been Hedge Row Shopping, commonly called wild edibles hunting. Lots of plants are growing all around for example the tips of young pine trees which help to make healthy survival and winter drinks. Also Dandelion as a earthy baste taste add in chamomile, borage and clover all found within minutes of my last place we lived.
. Most larger areas have some sort of person or group who does wild edible walks and talks. Luck to you