This 'tea' is delicious, and very soothing on the throat through the winter. In Korea, it is made with pomelo or citron, but I have also enjoyed it with lemon, and have heard that it can be made with any citrus fruit. Among my small circle of Korean friends, no one makes this at home, so I learned from some kind of sketchy instructions off the internet, and am enjoying the results. In the comments section, I welcome input from anyone who can tell me more. This makes a wonderful winter holiday gift.