Attmu Classic Rubber Transparent Hot Water Bottle 2 Liter With Knit Cover On those days when cramps strike hard, the Attmu Classic Rubber Transparent Hot Water Bottle 2 Liter With Knit Cover ($10) will be the perfect accessory to your comfiest knit sweater. Image Source: amazon.com Attmu Classic Rubber Transparent Hot Water Bottle 2 Liter With Knit Cover $10 from amazon.com Buy Now