A one-hitter (also oney, bat, tay, oney bat, or taster) is typically a slender pipe with a screened narrow bowl designed for a single inhalation, or "hit", of smoke or vapor from a small serving (about 25 mg) of heated cannabis flower, tobacco leaf or other dry, sifted herbal preparation. It is distinguished from western-style large-bowl pipes designed for strong tobaccos that are burned hot and tasted but not inhaled. Instead, by properly distancing a lighter flame below the opening, inhalant users operate at vaporization temperatures, minimizing combustion waste and toxicity.
Traditional national varieties of one-hitter pipes have included Native American calumet ("peace pipe"), kiseru (Japan), midwakh (Middle East), sebsi (Morocco) and some narrow chillums (Nepal, India, Jamaica).
A one-hitter has been considered drug paraphernalia in certain regions.