A container for collecting, transporting, storing, delivering and dispensing fluid. The container has a hollow tube with an outer circumference diameter and is configured to receive a plunger. A collection adaptor and a dispensing adaptor provide interchangeable coupling of a variable volume container such as a syringe with a collection device such as a breast pump and a dispensing device such as a nipple. The container also has a circumferential seal assembly secured at one end of the hollow tube. The seal assembly outer diameter is substantially similar to the hollow tube outer diameter.