Sunvalley Brands via Amazon offers the Vava 24-Hour Waterproof Rugged Wireless Bluetooth Speaker for $32.99. Coupon code "L8PWVD4V" cuts it to $19.99. With free shipping, that's $7 under our January mention and the lowest price we could find by about $18. It features an IPX6 waterproof rating, up to 24 hours of playback, a 5,200mAh rechargeable battery, and carabiner clip. Deal ends April 18.