Camping-style cold brew

We used a sencha flavoured with banana, mango, melon, etc: https://tea.gr/eshop/caribbean-cocktail/

We left about two tablespoons of tea in 300ml of room temperature water for maybe an hour, then bought a bottle of cold water, emptied 300ml from it, and put the concentrate in. Very tasty and refreshing.

Our plastic jug is old and has a lot of salt stains unfortunately, sorry for this.