Shake your way to health, in style and in steel, with Cheeki shakers. Perfect for protein and weight loss shakes. Shakers have embossed markings for easy measuring and come with a stainless steel mixing ball. Manufactured from 304 premium grade stainless steel with no inside lining, toxic free ink and BPA-free parts. No more smelly plastic shakers! The shakers should be handwashed only to retain the print.