The Steel Bottles with Straw ? Free Size are a perfect combination of practicality, durability, and style, designed to meet all your hydration needs while on the go. Whether you're hitting the gym, going for a hike, commuting to work, or just running errands, these bottles are the ideal choice for those who want to stay hydrated in an eco-friendly, convenient way.Made from high-quality stainless steel, these bottles are built to last. Stainless steel is known for its strength, resistance to corrosion, and ability to maintain the temperature of your beverages for extended periods.