Hydration Thermos Hydro Flask Shaker Thermo 710ml Black. The HYDRO FLASK Shaker Thermo is the perfect companion for staying hydrated on the go. With a capacity of 710ml, this shaker thermos is perfect for keeping your favorite beverages hot or cold for hours. The sleek and stylish black design adds a touch of sophistication to any outfit or gym bag. The shaker top makes it easy to mix up protein shakes, smoothies, or other beverages on the fly. The durable stainless steel construction ensures that this thermos will stand up to daily use and keep your drinks at the perfect temperature. Stay hydrated in style with the HYDRO FLASK Shaker Thermo.