You know what would go great in that wattle bottle cage on your bicycle? Not a plastic water bottle. Come on, that’s so 90s. I was thinking a wireless Bluetooth speaker. boomBOTTLE ($150) fits perfectly in that space, and when water finds out its been replaced and comes looking for revenge, don’t worry: boomBOTTLE is weatherproof. Dual 40mm drivers and a passive subwoofer push your tunes out through the Omni-directional speaker, sending music in all directions. The integrated music controls let you handle the basics, and the rechargeable lithium polymer battery does its thing for up to 10 hours.