TempShield️ double-wall vacuum insulation keeps drinks cold up to 24 hours, hot up to 12 Made with 18/8 pro-grade stainless steel for durability, pure taste and no flavor transfer Spring-assisted flip top chug spout Whisk ball for quick and easy mixing, even the thickest supplements Removable gasket for easy cleaning Leakproof when closed Ergonomic shape for a good grip Internal measurement markings BPA-Free Dishwasher safe