Flex Straw Cap makes cold refreshment that much easier Flex Straw Cap is leakproof when closed, to transport without worry Flex Strap is easy to transport and comfortable to carry Honeycomb™? Insulated Cap Insulated Cap for maximum temperature retention Made with 18/8 pro-grade stainless steel to ensure durability, pure taste and no flavor transfer TempShield®? double-wall vacuum insulation keeps beverages cold up to 24 hours and hot up to 12 hours Color Last™ powder coat is dishwasher safe, keeping your bottle slip-free and colorful Dishwasher safe BPA-Free & Toxin-Free Free from toxins, free from worry