Professor Glass x Swanny 雙重費斯特

The pink glow under the lights is a fun party trick, and the GA serum really does add a unique feel on the tongue. Hits smooth and steady for its size.

That 5-inch height is perfect for desk sessions, and the GA serum shifting pink under my desk lamp is a fun little surprise every time I glance over. Hits smooth and sturdy, exactly what I needed.

The glow-in-the-dark GA serum on this piece is such a cool party trick—it shifts pink under the lights exactly as described. For a 5-inch rig, it hits surprisingly smooth and feels solid in hand.