Simple Cell Inc via Walmart offers the Scosche Bth2ogy boomBOTTLE H2O Wireless Speaker
in Grey, model no. SCO-BTH2OGY-A2, for $24.99
with free shipping
charges the same.) That's the lowest total price we could find by $5. It features a military-grade waterproof design, Bluetooth 4.0, and about 11 hours of playback per charge.