All-brew tumbler. Beautifully-made, sustainable, all-purpose beverage flask. The explorer 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 explorer'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. Removable flask sleeve adds another level of insulation. 14 Oz / 400 ml.