Expand the capacity of your BlenderBottle® ProStak® system. Extra 100cc and 150cc jars double the initial capacity of your system, while the massive 250cc jar offers ample room for even the largest protein, meal replacement, and on-the-go nutrition needs.
Built to take a beating, the Expansion Pak jars keep contents in place and your gym bag clean.
The massive 250cc jar makes room for even the largest nutritional supplements, chopped fruits, and more.
TWIST N' LOCK TECHNOLOGY
Easily attach jars to each other in any order and any size. A quick quarter-turn locks them together, making for simple, streamlined portability.
Quickly attach Expansion Pak jars to the bottom of the ProStak shaker cup thanks to the unique