A reusable drinking straw foldable for storage, the drinking straw comprising: an external tube formed of a plurality of tubular segments, said external tube having a proximal end, an opposite distal end, a hollow interior and a central longitudinal axis passing through said ends, said hollow interior being accessible through said ends and having an interior diameter, each of said tubular segments when adjacent to one another along the central longitudinal axis forming said external tube; and a flexible internal tubing having a proximal end, an opposite distal end, and a passageway through said ends of said internal tubing, said internal tubing being formed of an elastic material allowing passage of liquid through said passageway and being impermeable to liquids, said internal tubing being foldable to a compact configuration for storage, said internal tubing being positioned within said external tube with said proximal and distal ends of said internal tubing proximate to said proximal and distal ends, respectively, of said external tube, wherein each of said tubular segments at least partially surrounds a portion of said internal tubing, wherein said drinking straw is in an extended configuration when at least two of said tubular segments are adjacent to one another along the central longitudinal axis to form said external tube with said flexible internal tubing therethrough, said flexible internal tubing being under tension within said external tube to maintain said tubular segments adjacent to one another along the central longitudinal axis, wherein said drinking straw is in a folded configuration when at least two of said tubular segments are apart from one another and said internal tubing is folded between said at least two tubular segments. an external tube formed of a plurality of tubular segments, said external tube having a proximal end, an opposite distal end, a hollow interior and a central longitudinal axis passing through said ends, said hollow interior being accessible through said ends and having an interior diameter, each of said tubular segments when adjacent to one another along the central longitudinal axis forming said external tube; and a flexible internal tubing having a proximal end, an opposite distal end, and a passageway through said ends of said internal tubing, said internal tubing being formed of an elastic material allowing passage of liquid through said passageway and being impermeable to liquids, said internal tubing being foldable to a compact configuration for storage, said internal tubing being positioned within said external tube with said proximal and distal ends of said internal tubing proximate to said proximal and distal ends, respectively, of said external tube, wherein each of said tubular segments at least partially surrounds a portion of said internal tubing, wherein said drinking straw is in an extended configuration when at least two of said tubular segments are adjacent to one another along the central longitudinal axis to form said external tube with said flexible internal tubing therethrough, said flexible internal tubing being under tension within said external tube to maintain said tubular segments adjacent to one another along the central longitudinal axis, wherein said drinking straw is in a folded configuration when at least two of said tubular segments are apart from one another and said internal tubing is folded between said at least two tubular segments.