A reusable drinking straw that is foldable into a compact configuration for storage and easily transportable in a storage case. The straw comprises a rigid external tube and a flexible internal tubing that is foldable to a compact configuration for storage. In a folded configuration, the reusable straw has a significantly reduced length of approximately one-half to one-fourth of its extended length when in use. The external tube of the straw is preferably formed of multiple rigid segments for supporting the flexible internal tubing in the extended configuration during use as a drinking straw. A simple cleaning device is provided to clean the straw after use. A storage case is provided to store the straw in the folded configuration in a compact form and to store the cleaning device.