Speed Control  Variable shaking speed.  Customizable Mixing Action  Create any mixing action from a smooth vortex to sloshing aeration or anything in between.  Heavy Duty Base  Combination of weight and specially designed feet prevent walking even at highest speed.  Increased Capacity  Optional stacking tray increases capacity.  Holds Odd Shaped Containers  Ideal for gentle shaking of odd shaped vessels and containers.  No Additional Holders or Accessories Necessary  Shaker is ready to use as supplied.  Unique Platform  Non-slip platform tray features edges that contain any spills.