As I own a good mint bush (last year I bought a pot of discounted mint at a supermarket, divided it in three plants and planted one in the ground and two in pots. The one planted in the ground did very well, the potted ones are tiny) I decided to make mint tea as it aids digestion and soothe a sore throat if you add honey.
Why an envelope? Because it makes a dark, breathable environment for the drying mint and you don't get any shedding. When it's dry (it might take up to a week), I put the mint on a tray and detach the leaves from the stems, placing them in a jar. I keep the jar in a cupboard in the kitchen. When I want to make tea I soak some leaves in a jug full of hot water and strain the tea when it's ready. If I'm making just one mug I use a little nut that is designed for leaf teas so you can infuse a mug without any debris floating in your tea. If you don't know what I'm talking about, here is a little sketch.