Today only, Groupon offers the Ecoxgear Ecorox Waterproof Portable Bluetooth Speaker in Black or Orange for $37.99. Coupon code "SURPRISE" drops it to $34.19. With free shipping, that's $6 under our mention from December and the lowest total price we could find by $36. (It's even $6 under the best available price for a refurb elsewhere.) It features an IPX7 waterproof rating, auxiliary jack, up to 10 hours of playback per charge, microphone, and measures 5" x 2" x 3".