Hydrapak, the U.S.-based producer of innovative hydration systems, has announced that it has doubled the size of its headquarters in Oakland, California. The expansion comes on the heels of its new partnership with REI, as the retailer selected Hydrapak's award winning SoftFlasks to headline its “First to Market” program, selling exclusively at all 129 REI stores through May 2014. The new deal with REI is expected to boost demand for Hydrapak's SoftFlask as well as for its reservoir and insulated bottle products in general. Hydrapak's new 10,000-square-foot, eco-friendly facility features a new in-house photo studio, an expanded testing lab for quality control, storage space for increased product inventory, and an additional 1,000 square feet of office space, to accommodate more comfortably its team of ten persons in anticipation of further staff expansion.