(~$5): A budget-friendly, classic choice. Reviewers from Scribd note it is "way louder" than cheap plastic alternatives and includes a durable lanyard. Molten Valkeen Whistle with Flip Grip Molten USA& more Go to product viewer dialog for this item. Molten Valkeen

: A multifunctional tool that includes a compass and thermometer, praised on GoSupps as a practical gift for scouts or hikers. Musical Whistles (Tin Whistles) Generation D Whistle McNeela Music Go to product viewer dialog for this item. Generation D Whistle

(~$15–$25): Reviewers on Amazon describe it as "exceptionally loud" and useful for multi-user environments where sharing a traditional whistle is unsanitary. It features three distinct tones. Survival & Emergency Whistles

Built for maximum volume to attract help in outdoor environments. Hyperwhistle Go to product viewer dialog for this item.