The BlenderBottle ProStak Twist n' Lock Storage Jars Expansion 3-Pak with Handle expands the capacity of the BlenderBottle ProStak system, making it easy to carry more proteins, powders, vitamins and pills, supplements and more. The ProStak's unique interlocking jars have individual lids and a removable handle, so it's possible to carry it all with or without the shaker bottle. The 3-Pak features 100cc and 150cc jars, doubling the initial capacity of the ProStak system, while the massive 250cc jar offers ample room for even the largest protein, meal replacement, and on-the-go nutrition needs. A covert pill tray locks into any jar lid, for carrying pills and vitamins in the same jar. BlenderBottle ProStak Twist n' Lock Storage Jars Expansion 3-Paks are made from the same durable materials as all BlenderBottle products, are dishwasher safe, and BPA and Phthalate-free.