Empty, re-usable bottles feature air-tight, non-clogging caps with wire closure system keeps your preferred medium ready for immediate use and a low-density polypropylene bottle that is easy to squeeze. Use with a wide variety of mediums including acrylics, inks, watercolors, dyes, fabric paints, henna, masking fluid, and water-based adhesives. Details: White 1 fl. oz 18 gauge fine tip Airtight container Polypropylene