Lip plumpers are topical products designed to temporarily enhance lip volume and definition. They typically contain active ingredients like hyaluronic acid, which hydrates the lips and creates a fuller appearance, or peptides, which stimulate collagen production for long-term plumping effects. Popular types include hyaluronic acid-based, peptide-based, and sugar-based plumpers. They offer benefits such as increased volume, improved lip shape, and reduced fine lines.