This is hiw i make coffie .im at camp where theres no coffie maker and this is how i make my single serve coffie in the morning.i dont use ciffie machine's because there dirty and hold bacteria eaven if there cleaned on the regular they still collect. This way gives you no grounds and its a lot cleaner and safer than cooking your coffie in hot plastic.yea the pit is glass but the rest if it isnt.maby someone will find this usefull.have a great week......
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https://www.youtube.com/watch?v=SujHVQ883F8