In case you haven’t noticed, swim trunks aren’t exactly the best place to hide keep a wallet, keys, or cell phone on a day at the beach. Leaving them unattended on your towel probably isn’t the best idea either. That’s why you might want this contraption. The Yelpie Portable Safe. It may not look like anything special, but this little weather-resistant yelper hides an extra function, one that thieves may not suspect. After you set it down on your preferred beach spot and set the lock, any movement (without entering the code) will trigger the motion alarm. The 90dB alarm will alert everyone around that something bad is going down, deterring the thief from trying any funny business, dropping the Yelpie and heading for the hills. Of course, if they’re not deterred by an alarm, you’re out of luck. You can find the Yelpie Safe for about fifty bucks if you like situations where you are standing there fumbling with a loud alarm.