Ideal for cyclists, backpackers, skiers, paddlers, hikers and campers, Hydro Flask's 12 oz Standard Mouth Vacuum Insulated Classic Stainless Bottle keeps drinks hot for 12 hours and cold for 24 hours! Hydro Flask bottles fit perfectly in most car, bicycle, and stroller cup holders and water bottles cages. Developed to perform in every environment, the Classic Stainless Bottle is cast from double wall vacuum insulated food grade 18/8 stainless steel, is BPA-Free and resistant to bacteria and odors. The 12 oz. size is perfect for young outdoor kids.18/8 Stainless Steel.Signature Matte Finish.Mouth Width: 1.9".Bottle Weight: 8.2 oz..Bottle Height: 5.9" / 7.6" with Cap.Bottle Circumference: 9.1".Bottle Diameter: 2.9".