This double-ended wing stamp and liquid pen liner from Kaja Beauty is smudge-proof, long-lasting, and waterproof, giving you a super easy winged eyeliner every time. This double-ended wing stamp and liquid pen liner from Kaja Beauty is smudge-proof, long-lasting, and waterproof, giving you a super easy winged eyeliner every time. Harnessing state-of-the-art Korean technology, Kaja Beauty crafts playful, food-inspired makeup to enliven your routine. From glossy, velvety, and creamy lipstick to vibrant and pastel eyeshadow, each product is a treat to your day.