Abstract: A folding hat formed from sheet material, including a crown and a brim, wherein the brim is attached to the crown, and a bottom rim portion of the crown imparts shaping to the brim. In one form, an upper surface of the crown is indented, and the bottom rim portion of the crown supports the brim in a generally continuous curve whereby an upper surface of the brim is curved from one edge of the brim to an opposite edge of the brim.

Abstract: A portable, digital dipstick-style measurement and analysis system wherein an onboard portable, battery powered computer module is physically and communicatively linked to an elongated measurement rod for collecting data on stored liquid fuel and vapors, wherein collection of data is either user-controlled or sensor activated, wherein user-selectable analysis functions are performed by the computer module and wherein data and analysis reports are printed and/or digitally stored on a portable data transport such as, for exemplary purposes only, floppy disk, CD or tape.