Expand the capacity of your ProStak system. The 100cc and 150cc jars double the initial storage capacity of your system, while the massive 250cc jar offers ample room for larger supplements and snacks.
Lock and load. Connect jars together with a quick quarter twist to streamline your on-the-go nutrition.
A covert pill tray locks into any jar lid, allowing you to carry pills and powders in the same container.
The removable carry handle attaches to any jar lid, making it easy to clip your Expansion Pak jars to a backpack for quick access.
Built to take a beating, Expansion Pak jars keep contents in place and your gym bag clean.