Poppy Crafts Glass Etching Cream 100ml. Use this permanent glass etching cream to create your own etched designs on windows, mirrors and other household glassware. Follow the easy instructions on the bottle to create your own design. Cleans up easily with water. This package contains 100ml of permanent glass etching cream. WARNING - Do not get on skin or eyes. Do not inhale. Do not swallow. This product contains acid.