This bottle is a beast! Inside is stainless steel and easily cleaned. The opening is a wide mouth thatmakes filling and cleaning easier.It is heavy and durable! Kept my water cold 16 hours indoors.It is coated on the outside with the painted design shown, that is textured for non slip grip.The lid fits tight and is easy to remove. No leaks at all.It’s a nice 21oz size < my only complaint is it isnt a tad bit bigger! but that would defeat the ability to fit in cup and bikewater bottle holders, so I’ll take the trade off over size!I would recommend this bottle to any one who carries beverages during the day/night. Review by windzor on January 10, 2016