The 1/2 oz size are the same clear glass bottles supplied with our popular Igniter Kits. They have a wide mouth for easier access to contents and a thread-on, lined, black, Phenolic cap (2oz has rubber lined metal cap) to prevent corrosion and evaporation of solvents. These come three to a package per size. The 2 oz jars look like a "Salmon Egg" jar with a rubber lined metal lid.