I just bought a Delphin player from Underwater Audio and it's Spotify compatible. The Delphin is completely waterproof and allows you to use Sportify premium, Pandora one, or Audible to download music or audiobooks onto the device when you have WiFi. You can use the Delphin's Bluetooth capabilities to pair it with waterproof Bluetooth headphones or connect it directly to waterproof headphones. It is currently available on Indiegogo for pre-orders, which are going to be shipped in July. It can also be purchased in July when the product gets officially released. I can't wait to listen to music in the pool!
There’s a new portable music player that’s looking to change the game by moving away from typical MP3 syncing and syncing with Spotify instead.
Mighty, which is on Kickstarter, uses your Spotify Premium account for iOS or Android to store up to 48 hours of your music in a compact, exercise-friendly device about the size of an iPod Shuffle. It’s the only non-smartphone device that plays your Spotify playlists without needing to be connected to the Internet.Instead of plugging in Mighty to grab songs, you select and download your Spotify playlists through the Wi-Fi connection in your smartphone. Other MP3 players and smartwatches don't have Spotify capabilities.
Get a Mighty Audio streaming spotify player (device). They were on kickstarter but now sell on their website. Its like an ipod for streaming. It connects via the Mighty app, bluetooth or wifi to sync your playlists/songs.