From cooking extracts to essential oils, this 4 ounce clear Boston round glass bottle with black cone lined cap is as versatile as it useful. The traditional, sleek design of the Boston round bottle is attractively complemented by the clear glass and black cone lined cap. The ridged black cone lined cap ensures a tight fit, but it is easily opened. This bottle makes great packaging for handmade gifts of vanilla, elderberry syrup, oils, liquor samplers, and extracts, and can be easily labeled for commercial purposes.