1. JAY presents shaker bottle in high grade stainless steel,Stainless steel shaker bottles are good for the environment and good for your health. Have a longer serving life then plastic shaker bottle. 2.100% DISHWASHER SAFE GYM SHAKER STEEL - Our Gym Shaker Steel and lid can be easily cleaned through a dishwasher or by hand. This Gym Shaker Steel have gone through several test by Gym Professional without any problems.3.100% LEAKFREE GYM BOTTLES FOR MEN - Every single Steel Shaker Bottles for Gym is strictly tested under a pressure machine of any leaking by our staff and have passed the LEAKFREE test.4. it's Strong and its sturdy and also extremely friendly to our environment. Unique brushed stainless finish gives it lasting finish.5.100% BPA Free, Adopting 0.6mm, thick 304 stainless steel, surface with varnish, Resistant to dirt.7.Comes with mixing spring ball for easy and smooth protein shakes