Lifeline Survival-in-a-Bottle

Survival in a bottle is $14.99 at Walmart but the whistle appears to be the one item that may be worth the price on Woot.
http://www.walmart.com/ip/Lifeline-4742-Survival-In-A-Bottle/21799874

$15.64 at the mothership.
http://www.amazon.com/Lifeline-First-4742-Survival-Bottle/dp/B001UP0W8E#customerReviews