Available in sizes ranging from 5–60 mL, New Shaker single-dose bottle stores dry, functional-ingredient powders in plug and plunger located under cap, with flavored liquid contained in bottle. Separation helps keep dry ingredients as stable and fresh as possible and prevents degradation. To use, consumer screws cap down, past safety ring, until cap rests on bottle shoulder. This causes plunger to press through plug, releasing dry powder into liquid below.