NABLA Cosmetics RSVP Shine Theory Lip Gloss ($15.00 for 0.1 oz.) is a medium-dark, plummy red with warm undertones and lots of copper and gold pearl throughout. It had medium coverage (and wasn't described as sheer) that covered my lips without streaking but had some product that sank into my deeper lip lines enough to be noticeable in person.
The gloss had a smooth, non-sticky, more gel-like texture that was comfortable to wear and spread well over my lips. The product stayed on decently for three and a half hours and felt moisturizing over time.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
Shine Theory Lip Gloss. Theory becomes real. Thanks to its thin and ultra-mirrored formula, this Lip Gloss gives extraordinary shine to your lips. The finish is wet, multidimensional, super luminous and non-sticky. Perfect also as a top coat.