Luxurious, silky brushed stainless-steel exterior — the Primus Steel features an adjustable carry loop for easy portability and a lock-in-place, rubberized screw-cap that delivers a solid grip and the best leak-proof experience imaginable. Whether at the gym, outdoors, or the office, AeroBottle is the perfect companion for mixing, drinking, carrying and refueling — every single day.Features for Primus Steel ShakerConvenient wide-mouth for adding more than just water.Integrated, patent-pending TMT perfectly blends protein powders, energy drinks, meal replacements and much moreWhen you need it most. The Multi-position finger loop is perfect for easy transportation. Attach it to your keys or bag and simply carry it anywhere, at any time!Quick turn, rubberized screw-cap guarantees a no-slip grip and the best anti-spill experiences imaginable.