Protect yourself and enjoy beverages in style with the Antimicrobial Stainless- Steel Tumbler. This durable tumbler takes double-wall technology and combines it with an antimicrobial additive, providing both a safe and enjoyable drinking experience. Made of kitchen-grade 18/8 stainless steel with an antimicrobial, safe additive that helps prevent growth of bacteria. Keeps drinks hot or cold for up to 6 hours and it is spill-resistant due to the thumb slide lid with rubber gasket. BPA Free. Not dishwasher safe, hand wash only. 20 oz.