Rebound Silicone Hand Pipe with Metal Screen, These nearly indestructible pipes are perfect for the clumsy consumer. The easy-to-clean silicone guarantees a durable piece is a variety of colors. 4" long, Assorted Colors. Rebound Silicone Hand Pipe with Metal Screen, These nearly indestructible pipes are perfect for the clumsy consumer. The easy-to-clean silicone guarantees a durable piece is a variety of colors. 4" long, Assorted Colors.