Abstract: The pocket straw is a straw. The straw is a tube used to consume a liquid. The pocket straw comprises a tubular transport structure and a plurality of caps. The tubular transport structure has a composite prism structure. The tubular transport structure has a tube structure. The tubular transport structure forms the tube of the pocket straw. A vacuum is created at an end of the tubular transport structure such that the liquid is drawn through the tubular transport structure for consumption. The tubular transport structure is a telescopic structure such that the span of the length of the center axis of the tubular transport structure is adjustable. The plurality of caps enclose the open ends of the tube structure of the tubular transport structure when the pocket straw is not in use.