The Amber Boston Round Glass Bottles are perfect for travel. Just fill it with your liquid of choice and label. The best part is that the Black Cream Pump works very well. Good quality glass ensures you do not break it when accidentally dropping it on a hard surface.
Closure sizes are expressed using two different numbers.
For example, a closure size of (20/400) has a diameter of 20 mm and fits a bottle with a 400 GPI thread finish.
Some neck sizes are interchangeable. For instance, a 20/410 closure will usually fit on a 20/400 bottle. Also, 410 and 415 are usually interchangeable if the closure is not tamper evident.