Sure, Bluetooth speakers have gotten much cheaper over the last couple of years, and shoppers have more choices than ever when deciding which one to buy. However, you'll find significantly fewer options once you start adding on features like water-resistance, NFC pairing, and a built-in power bank. If you'd like your next speaker to have any, or all, of these features, you'll want to check out the Anker Soundcore Boost. Right now, you can pick one up as part of Amazon's latest Deal of the Day for an all-time low of $44.99, saving yourself $15 in the process.