Well, we did do extensive field trials on the Khaki battle bowlers Faulty and they did surprisingly well against a side attack with the Singha 33 fluid oz bottle and it stood up well against the full frontal Heineken and Tiger but failed miserably on the rear bash with the Bacardi Breezer.
The black ones not only passed the Bacardi Breezers but survived several lady swipes with a really heavy coke bottle! Well worth the money IMHO!