That is called 🧉 Mate. Very popular hot drink in Argentina and Uruguay. It’s like a tea.. you put those leaves in the “mate” and pour hot water. Then sip it though the metal straw.

Typically three sips and you are done.. then you pass it along with family and friends using the same straw ..

this will come back to you eventually and will keep running until you run out of hot water or until you need to replace the herbs

Topically a bitter herbal taste that takes time for someone to get used to until you do.. and then it becomes your day to day drink