GAI cutting oil is a colorless-odorless-synthetic lubricant that helps extend the life of your glass cutters. It flows evenly, resists rust, and won't gum up even after sitting dormant for months. The new yorker conveniently fills your cutter straight from the bottle. It is non-corrosive and water soluble for easy cleanup. Put a piece of paper towel into a small cup and cover with a bit of cutter oil. Dip the tip of your glass cutter onto the towel every few scores. You'll get better scores and your tools will last longer. Available in a 4 ounce child proof container.