Thermos is partnering with Under Armour on a line of co-branded bottles. The new BPA-free line will be available beginning in May 2011 at sporting goods retailers, and will include insulated stainless steel bottles, Tritan plastic bottles and squeezable bottles.

The entire line will feature an interchangeable four-lid system, which includes a range of designs from a traditional screw top lid to an innovative flip-top spout lid with one hand push button operation.

“This partnership allows us to reach a segment that already makes up Under Armour's core consumer, the active athlete who relies on staying hydrated to perform at his or her best,” said Rick Dias, President and Chief Operating Officer at Thermos. “Given the strong correlation between cold hydration and improved athletic performance, we're confident that this partnership will result in superior hydration for better performance at all athletic levels.”

“Under Armour is constantly pursuing new innovations and products to help give athletes an edge in performance,” said Edward Giard, VP Licensing and Accessories at Under Armour. “Our partnership with Thermos, a leader in the hydration bottle category, allows us to continue our mission to make all athletes better and equip them with the best performance gear possible.”