| 摘要 |
A lipstick cup for securing a lipstick cylinder or bullet, suitable for a soft lipstick formula, having a cylindrical body with a base and a sidewall having axially-arranged ribs distributed substantially evenly around the inner circumference of the sidewall near the base,, that extending radially inwardly from the sidewall, and a plurality of shallow undercut structures distributed substantially evenly around the circumference of the sidewall, disposed circumferentially between the pairs of adjacent ribs, and tapering inwardly from the inner surface of the sidewall toward the base to provide an undersurface. The plurality of ribs displace and compress a portion of the material of the lipstick composition circumferentially toward and between the undersurface of the shallow undercut structures, and the base, for preventing the product from being dislodged from the cup. |
