When you're out in the summer heat, bringing water with you is key. It doesn't take a fancy bottle to do that—the best models are easy to drink from, easy to clean, and tough enough to meet the demands of everyday life and adventurous outings. We tried out several water bottles to find the best, lightest, and coolest vessels on the market. Best Water Bottles What to Consider Material Water bottles are usually made of one of three major materials: metal, plastic, or glass. Metal bottles (usually aluminum) come with durability against drops or scratches, and are definitely an attractive option for campers or generally clumsy people. Many metal bottles also come with insulation and a Thermos-style design to keep your water cold and your tea, coffee, or soup hot. Metal bottles are typically much heavier than their plastic counterparts. Glass bottles are the right option for anyone with a particularly sensitive palate to slight changes in taste. While completely safe to use, some plastic and metal water bottles can leave a slight metallic or plastic aftertaste in your mouth. Glass bottles avoid that…