These sets are great to have around for A/B testing teas, including testing for agrochemicals.
The method for using them is to use three grams of tea steeped for five minutes and then decant into the bowls. Before that, slowly smell the dry leaves. Then you can also look at the open wet leaves. We turn the spoon upside down after dunking it in the liquor to smell that as well. Finally, we sip a small spoonful, paying attention to the criteria offered in the November 2020 issue of Global Tea Hut. The tea is usually strong, so a spoonful is enough in most cases. The test set comes with two spoons so you can do this with a friend and clean the spoons between tea liquors using a bowl of hot water, or if you are alone, you can use one spoon for each tea, which is more convenient.