The invention concerns a mold for forming a single-use floss holder containing a length of dental floss having a wax composition applied thereto, the mold including a first part having a first cavity disposed therein, the first cavity defined by a bottom base surface and a peripheral sidewall, and including a base portion, first and second spaced-apart portions having proximal and distal sections and extending from the base portion, and a second part having a second cavity disposed therein, the second cavity defined by a bottom base surface and a peripheral sidewall, and including a base portion, first and second spaced-apart portions having proximal and distal sections and extending from the base portion and terminating in the distal section； and a groove having an aspect ratio of about 10:1 1 or greater and having first and second terminal sections and a mid-section, the groove extending an entire width of the second part, where the first and second terminal sections of the groove traverse and are coincident with the distal section of the first and second spaced-apart portions of the second cavity, respectively.
