SHAKER BOTTLES ARE 100% FOOD GRADE MATERIAL THE MOST SAFE & HEALTHY MATERIAL FOR BOTTLES WHICH IS BPA FREE. ECO FRIENDLY SAFE FOR ALL LEAK PROOF STORAGE CONTAINER WATER BOTTLE PLUS SHAKER FOR PREPARATION AND SAVING TIME WIDELY USE: IT IS LARGE ENOUGH (600 ML) TO KEEP YOUR WATER ALL DAY WHEN YOU ARE IN GYM PRACTICE CLASS HIKING YOGA OR OTHERS SPORTS.