Sony demo their Xperia Z is truly waterproof in the Czech Republic. The demo was held in T-Mobile store. The model in the bikini brings the Xperia Z into a shower booth and took a shower together. It draws quite a crowd.
Most likely the crowd was there to see the impressive phone and how waterproof it was, and not for the models. To be fair the folks from Sony and T-Mobile also had a guy in there testing the new device. We loved the Xperia Z when we got our hands-on it, and sadly haven’t heard any details on a US release but are expecting to learn more shortly.
Source: Android Community