The GRAV Hourglass Pocket Bubbler Rig is ideal for anyone who loves dabbing, whether you're a beginner or an experienced user. It's perfect for when you're out and about or just chilling at home. The rig is made of dense 3mm borosilicate glass, which is durable. It has a low water line that enhances flavor. It's small enough to fit comfortably in your hand, making it super portable.