A non-floating beverage infuser and rigid clamp and method thereof comprising, in general, a suspension bag of flexible liquid permeable material that contains preselected flavor and/or gassing additives, an elongated member having a first and second end, the first end is affixed to the suspension bag, and a rigid clamp affixed to the second end of the elongated member to affix to the rim of a glass, and, thus, functions to provide deep submersible infusion of preselected flavor and gassing additives while preventing the upward flotation of the additives in a beverage.
