Satisfaction Guarantee: Thickened glass inside ensures durability and prevents breakage. Replace free if broken within 3 months. Large Capacity: 64 oz size allows one full bottle of water without frequent refills. Exact Volume & Time Marker: Markings help track daily water intake for health goals. BPA Free & Leakproof Design: Made of eco-friendly glass, leakproof cap seals tightly. Ideal Gift: Vibrant colors make a great hydration bottle for work, school, travel.