Haw. Rev. Stat. § 321-211
As used in this part:
"Electronic smoking device" means any electronic product that can be used to aerosolize and deliver nicotine or other substances to the person inhaling the device, an electronic cigarette, electronic cigar, electronic cigarillo, or electronic pipe, and any cartridge or other component of the device or related product.
"Possession" means knowingly having direct physical control at a given time or knowingly having the power and the intention, at a given time, to exercise dominion or control, including the actual use of the tobacco product.
"Tobacco product" means tobacco in any form, including an electronic smoking device, cigarettes, cigars, snuff, and chewing tobacco, that is prepared or intended for consumption by, or the personal use of, humans.
HRS § 321-211