6PCS Safety Survival Whistles with Adjustable Reflective Lanyard Emergency Plastic Whistle Marine Whistle Microwave Cover soak them in a mixture

soak them in a mixture of warm water and baking soda (or white vinegar) for 15 minutes to dissolve tough grease and kill bacteria

press the surface firmly for 5 seconds

travel kit or pocket

camping tents

6PCS Safety Survival Whistles with Adjustable Reflective Lanyard Emergency Plastic Whistle Marine Whistle Microwave Cover soak them in a mixturePackage Includes: The package includes 6 safety whistles with adjustable reflective lanyard, which are suitable for personal family and team use. ABS Plastic Material: Our emergency whistle is made of ABS plastic, which is lightweight, waterproof and durable. With double tube design, each plastic whistle can emit high and low frequency sounds. Adjustable Reflective Lanyard: Reflective design has high visibility through light irradiation in the dark.