BlenderBottle C00301 GO STAK Blender Bottle, 4-Piece Starter Pak, Black Stackable, interlocking containers for carrying powders, vitamins, supplements, and snacks Includes four containers: (1) 40cc jar, (1) 60cc jar, (1) 100cc jar, and (1) 150cc jar Twist n' Lock system connects containers of any size in any order; a quarter turn locks them together Removable carry handle for easy carrying or clipping to bag; stack fits inside BlenderBottle Classic and SportMixer shaker bottles for portability Durable Eastman Tritan plastic material is stain and odor-resistant, so jars remain clean, clear and fresh; BPA and phthalate-free; dishwasher safe