That's been more than a year, in addition to being still empty.
They can also contain ingredients with healing properties such as citric acid and gum Arabic. https://7vxebgqh472Vdjfwvytxhqlcnovtlzajpzteyqgjezb53g4Mnayq.cdn.ampproject.org/c/Brush114.Co.kr%2Fbbs%2Fboard.php%3Fbo_table%3Dfree%26wr_id%3D1147124