Luxottica's latest idea for a pop-up store holds water … or rather, water holds it. The company recently set a Sunglass Hut concept store afloat in Sydney Harbor in Australia. In late November, the company located the floating store in three different locations in the harbor, and donated 10 percent of its sales to the OneSight Foundation, a charity run by Luxottica that provides and promotes eye care. The store had a DJ booth and transparent fittings so customers would have excellent views around the harbor.