From RealBeer.com:
"Time magazine reported than a bulletin sent to 18,000 state and local agencies last week advised local authorities to look out for plastic-foam containers, inner tubes and other waterborne flotsam commonly seen around marinas that could be rigged to blow up on contact."
I see an opportunity for see-through coolers. Due to this, it will be necessary for me to inspect all coolers at our party on the 4th. In return for my diligent booby snooping, I will expect one beer per cooler inspected. Oh, and please, no flotsam allowed.
