A cool way to wash your brushes! This set includes a glass bottle of unspecified volume (it measures 8cm x 4cm wide) and a mysterious net-like material that rests inside...just pour your favorite brush cleaning solution (such as thinner) into the bottle and swish your brush around in the net-like material, which according to the packaging offers three times the cleaning power of normal brush cleaning methods. They go on to say that this net-like material is easy on the brushes, and won't leave any unclean areas. Sounds great! Brush washing solvents not included.