Easy to squeeze and ergonomically shaped to fit the runner’s hand. We went back to the drawing board to bring you the best handheld on the market. Through extensive research and testing, we created a flask that fits in your hand, is rigid where it needs to be, yet easy to squeeze. We have also added a flat bottom to provide a solid platform for filling your bottle. These incredible flasks are grip free and built to be ultra-light. We are excited to see this in stores and are confident that there is no better bottle on the market