Several of the serums use a donut-shaped (mini-donut) cushion applicator designed to hug lip contours for an even, precise swipe.
Listings show net weights including 0.42 oz, 0.15 fl oz (US), and 0.47 fl oz (US).
They can be worn alone for hydration or layered over lip balm or lipstick to add shine and enhance color.
Most entries are listed as serums, with at least one labeled as a balm. Stated beauty purposes include hydrating (including 'deep hydration'), moisturizing, and anti-aging.
Formulas commonly list polypeptides, argan ceramides, polyglutamic acid (PGA), and pomegranate seed oil for plumping, barrier support, and hydration.
Many listings state up to 12 hours of continuous or clinically proven hydration.
Descriptions vary: some note a subtle strawberry or other scented notes, while at least one product is explicitly unflavored and fragrance-free.
