Sometimes, miso soup is served with a cover. The cover might be stuck on the cup. At this moment, don't open with a force. It's stuck because of the air pressure. So, hold the cup with left hand and use right hand thumb and direction finger to push slowly to make a space between a cup and cover. After you open the cover, don't move it right away. It has water under. So, drop water before you put it side.
Let's learn MJER Iaijutsu. 
映画好き集まれ！
Be careful when you eat Miso soup.
Opening cover of miso soup
Sometimes, miso soup is served with a cover. The cover might be stuck on the cup. At this moment, don't open with a force. It's stuck because of the air pressure. So, hold the cup with left hand and use right hand thumb and direction finger to push slowly to make a space between a cup and cover. After you open the cover, don't move it right away. It has water under. So, drop water before you put it side.