Sunvalley Brands via Amazon offers the Vava Voom 23 24-Hour Waterproof Rugged Wireless Bluetooth Speaker for $34.99. Coupon code "BYIFA7R7" cuts it to $26.99. With free shipping, that's tied with our mention from a month ago as $8 off and the lowest price we could find. It features an IPX6 waterproof rating, up to 24 hours of playback, and carabiner clip. Deal ends September 19.