I saw a video online for this thing called Color Switch that is sold at Sephora. I bought this for a trip to NYC after seeing the video- truthfully I didn\’t think it would actually work, but figured if I didn\’t like it I could return it… oh my gosh! This is an amazing little sponge! I used my darkest black eye shadow I have, swirled my brush a couple of times in the tin and MAGIC the brush was completely, 110% clean from the color! I was able to switch from my darkest to lightest color and back again! I have been showing everything this magic tin! You will not go round with this purchase! It\’s a must have for anyone who likes to wear multiple color eye shadows!