Discover the perfect blend of eco-friendly design and practicality with the Flat Pocket Whistle from PolyForge. Crafted from biodegradable plastic and measuring just 43 x 22 x 3mm, this compact whistle may be flat, but it produces an impressively loud and clear double tone. Whether worn as a necklace or attached to a keychain, its convenient design ensures it's always within reach. Despite its small size, the high-pitched sound is guaranteed to capture attention when needed.