The Mesa Sport bottle is constructed with durable stainless steel and double-wall vacuum insulation that will keep drinks ice cold for hours. Featuring a new, innoviatve design, this layered Clean-Lock lid is constructed to protect from outside germs and lock every drop inside when you’re on the go. When you’re ready to sip, click the push-lock button and drink from the naturally contoured chug spout. Easily grab and move throughout your day with the flexible flex handle and cupholder friendly base. When you’re ready to clean, the interior silicone seal in the lid can be removed. Hand wash each part or pop them in the top rack of dishwasher for an easy clean.