Dual chamber nursery bottle

1. A dual chamber nursery bottle comprising cylindrically shaped upper and lower chambers having a generally circular cross-section with equal diameters for containing first and second liquids respectively disposed on a common axis and said upper chamber defining an open mouth in an upper portion thereof with a first rim around said open mouth; and further defining an internally threaded open bottom with a second rim around said open bottom; and a flexible nipple and collar positioning said nipple in sealing engagement with said first rim; said lower chamber defining a closed bottom and an internally threaded open top having a third rim; and a circular rotary valve assembly having a diameter equal to the diameter of said upper and lower chambers and including an externally threaded upper portion with a first shoulder and an externally threaded lower portion with a second shoulder; and means for sealingly connecting said upper and lower chambers to said valve assembly including a pair of sealing rings, and said circular rotary valve disposed between said upper and said lower chambers on said common axis with said externally threaded upper portions of said rotary valve engaging said internally threaded portion of said upper chamber with a first of said sealing rings in sealing engagement between said second rim and said first shoulder with a second of said pair of sealing rings disposed between said upper and said lower shoulders on said common axis with said externally threaded lower portion of said rotary valve engaging said internally threaded upper portion of said lower chamber with a second of said sealing rings in sealing engagement between said third rim and said second shoulder; and said rotary valve separating said chambers when in a closed position and connecting said chambers when in an opened position and wherein said rotary valve assembly is manually moveable to said open and said closed positions irrespective of whether said nursery bottle is in use or not in use and wherein the rotary valve is open and closed by rotation about the common axis.