Straw cap makes refreshment for little ones reliable and easy Perforated Flex Boot adds bottle protection and stability TempShield insulation keeps beverages cold up to 24 hours Made with 18/8 pro-grade stainless steel to ensure durability, pure taste and no flavor transfer Honeycomb Insulated cap for maximum temperature retention 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