STREAMLINE YOUR LIFE with a beautifully-made, sustainable, all-purpose beverage flask. The Naturalist is the only travel beverage container you’ll ever need – a combination of tea infuser, coffee thermos, cold brew coffee maker, fruit water infuser, sports water bottle, and more. ENJOY MORE VERSATILITY. The Naturalist's innovative stainless steel two-way filter is perfect for brewing hot and cold tea and cold-brewed coffee and filtering fruit-infused water. Standard infusers have 1mm holes – ours are .5mm for a more refined brew. SAVOR SMART, FUNCTIONAL DESIGN. The Naturalist's extra-large design holds 500 ml (17 oz) and is exquisitely crafted with premium stainless steel interior and all-natural bamboo exterior. All earth-friendly materials, 100% BPA-free, non-toxic, and resistant to stains, odors, and corrosion. Slim-line design fits all car cup holders. BE KIND TO YOURSELF AND THE EARTH. Take on the throw-away cup culture. Using the Naturalist every day instead of a disposable cup can save up to 23 lbs of trash every year and 88 lbs of C02 emissions. BE KIND TO SOMEONE YOU LOVE. The Naturalist is beautifully packaged for gift-giving--a perfect taste for earth-conscious loved ones or anyone on your list.