Rumble Go: Portable Cold Brew Coffee Maker (filter only)

 Rumble Go could be the world's most portable coffee maker. Just drop the Rumble Go filter into any compatible water bottle, and it's instantly transformed into a portable cold brew coffee maker. The brewing process couldn't be easier: just add coffee grounds and water and give it a "rumble", and your coffee is now brewing! See why it was recommended by Outside Magazine and Wall Street Journal, and selected the "Best Budget Camping Coffee Maker" by SF Gate. The universal, extendable filter is compatible with a range of popular 16-32oz WIDE-mouth water bottles, such as Nalgene®, Hydro Flask®, Klean Kanteen® and CamelBak®. See a list of known compatible bottles (plus instructions for measuring any bottles not listed).  Brew coffee while you travel. Cold brew might be the easiest way to make coffee away from home. See why Includes: + 18/8 Stainless Steel Filter, Specifically Designed for Cold Brew + Food-Grade Silicone Cap & Extendable Base (available in 2 colors) Don't have a Compati