EcoVessel Boulder Triple Insulated Stainless Steel Water Bottle and Thermos with Sport Screw Cap, 17 Ounces OFFERS VERSATILITY AND CONVENIENCE - The Boulder is where is all began! A versatile bottle offered in popular sizes to fit most cup holders, take it anywhere to enjoy your favorite hot or cold drinks. Its secure top and sweat-proof built will keep your drinks inside where they belong, so toss in a backpack or tote bag and go! TRIPLE INSULATION FOR SUPERIOR PERFORMANCE - This bottle features our vacuum TriMax triple insulation technology and has been tested to keep liquids cold for 36 hours and hot up to 8 hours for convenient hydration through the day DUAL USE LEAK PROOF TOP - Its dual use leak-proof top has a wide opening for easy filling and a small opening for easy drinking. A versatile vessel for anything, anytime, anyplace and now available with interchangeable tops DRINK WHAT YOU WANT - Fill your EcoVessel Boulder with tea, fruit, or ice for a different experience! Removable ice, fruit, and tea strainer accessory available so you never get bored of your drinks again.