Here's what other sites are saying:
Brew your favorite coffee on backpacking excursions and camping trips with the Ultimate Survival Technologies FlexWare Coffee Drip. This collapsible coffee drip works with a number two paper filter, brewing coffee into your favorite mug as you pour hot water over the grounds inside. It takes a couple of minutes for the water to soak the grounds and permeate through the filter, making a delicious cup of coffee in the process. The heat-resistant, food-grade silicone won't create harmful byproducts with hot liquids (it's BPA-free), withstanding temperatures up to 450 degrees Fahrenheit. Plus, it's dishwasher safe for deep cleaning once you return from camping.
Where to Buy
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GSI Outdoors H2JO! Coffee Filter
GSI Outdoors Personal Java Press
MSR MugMate Coffee/Tea Filter
$12 - $16
GSI Outdoors Ultralight Java Drip
$7 - $9
GSI Outdoors Collapsible Java Drip
$10 - $12