Portable Hot Water Bottle, Rubber Warm Water Bag With Soft Plush Waist Cover When you have cramps but also have errands to get done around the house, having a portable heat therapy tool will seriously come in handy. The Portable Hot Water Bottle, Rubber Warm Water Bag With Soft Plush Waist Cover ($14) has a hook-and-loop closure around the waist for hands-free relief. This set from Amazon comes with a regular hot water bottle bag too. Image Source: amazon.com Portable Hot Water Bottle, Rubber Warm Water Bag With Soft Plush Waist Cover $14 from amazon.com Buy Now