This handmade birch, mahogany, and copper rack holds four 200 ml dropper bottles with extra large droppers. The birch base and top are cut and engraved on our CNC machine while the copper loops that hold the bottles are hand formed from 2 gauge wire. The borosilicate glass bottles features a dropper with an extra large bulb that delivers about 5 ml (1 teaspoon) per squeeze. The wide tube of the dropper is perfect for thicker liquids such as syrups, oils, even salad dressings.