Lancôme Cils Booster XL Mascara Base - White Full Size 0.18 Fl Oz BNIB Authentic.

MSRP $30

From online source:

Lancôme Cils Booster lash primer evenly separates and coats eyelashes with a nourishing, conditioning formula to maximize the results of your mascara. Infused with micro-fibers and vitamin E, this lash primer helps improve natural lash length, thickness, and curl over time for a false lash effect.