For highlights and effects, Copic Opaque White - COPIC Official Website
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Opaque White with Brush, COPIC - Ellen Hutson LLC
essence Highlighter Brush - PINK PANDA
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12/24/18/36 Color Washable Watercolor Pen Set Kids Student Drawing Graffiti Water Color Copic Pens Markers School Gift Supplies - Art Markers - AliExpress