Walmart offers the First Alert 0.17-Cubic Foot Water / Fire Protector Chest for $18.90. Opt for in-store pickup to avoid the $5.99 shipping fee. That's tied with our mention from two weeks ago and the lowest price we could find by $10. It's fire resistant up to 1,550-degrees fahrenheit for 30 minutes and features a 1-push security key latch and lock system.