Above: Tips on how to make a sizzling water bottle even cozier (and its heat last more)? With a sizzling water bottle cowl. I’m coveting these Knitted Lambswool variations in crimson and inexperienced, $63.38 every (old-school rubber bottle included) from Harriett Grist of Chickpea Knit on Etsy, a perpetual favourite (or order straight from harriettgrist.com). A fuzzier choice is the Sheepskin Scorching Water Bottle Cowl from UK retailer Toast.