Feature: 1. DECOMPRESSION FUNCTION: The consultant said scream vent has a certain effect, but not necessarily effective for everyone, learn to self-regulation, in order to symptomatic decompression.Psychological experts believe that roar roar can temporarily vent pressure, but not for the source of pressure, the pressure still exists. 2. MATERIAL: It is made of ABS resin, in line with the human bodys mechanics. Urban white-collar workers, feel pressure, screaming toward the drain pot, in order to decompression. 3. INTERNAL DESIGN: The internal design has a unique silencer function, the hollow pipe allows users to shout loudly still breathing smoothly. The middle part of the bottleneck to grasp the comfort and thoughtful, the mouth of the arc can be completely wrapped in the mouth. Bottle body can effectively prevent the sound leakage, the sound is only one-third of the original. 4. EASY TO USE: The edge of the bottle has a prominent dot, holding the bottleneck, keep the bulge in the bottom of the bottle position below the bottle mouth buckle the whole mouth, you can enjoy shouting vent. Specification: The consultant said scream vent has a certain effect, but not necessarily effective for everyone, learn to self-regulation, in order to symptomatic decompression. Screaming blindly roar, no pressure source, the pressure still exists. The edge of the bottle has a prominent dot, holding the bottleneck, keep the bulge in the bottom of the bottle position below the bottle mouth buckle the whole mouth, you can enjoy shouting vent. Package List: 1 * Scream Ja Note: In the course of any discomfort, please stop using it immediately. This product is not easy to use for many people, pay attention to keep it clean before use.