The Aviator Bottles are crafted from durable food-grade PET materials. Their all-in-one SmartCap, designed for one-motion assembly, features multiple functions that ensure the cap is assembled, sealed, and secured in one step. The dosing cup is part of the closure system, always ready for accurate measurements. The rotational suspension closure uses a spring system that retracts when pressed, providing a smooth and secure seal with a click-slide feel. Perfect for preserving the integrity of any stored substance.