With colder days ahead, the classic hot water bottle is of course a great invention to keep warm. With this pattern, you can create a nice and soft cover for your hot water bottle. To crochet this cover you can use Worsted/Aran #4 acrylic yarn and a 4.0 mm crochet hook.
You can find the free crochet pattern of this Hot Water Bottle Cover on the website of Jera’s Jamboree. For the free version you’ll have to scroll down on her page.