My personal drink items are Ulleungdo umbrella and Gorosoe (a type of tree sap).

Let me introduce my own health drink. It's Ulsan Gorosoe from Ulleung Island. Gorosoe is absolutely unavailable in this season. I buy a large amount during the peak season, freeze it, and eat it throughout the year. These days, they even sell frozen ones in winter. I have been giving it to my child since they were young, and they say it's sweet and delicious, asking for more. When eaten cold, it tastes sweet, but with an unnatural sweetness, it makes me feel healthier.