Hydro Flask® water bottles are developed to perform in every environment. Each bottle is cast from double wall, vacuum insulated, food grade, 18/8 stainless steel, therefore they are BPA-Free and resistant to bacteria and odors.
The narrow mouth bottle is Hydro Flask's original mouth size. It is ideal for keeping your liquids chilled all day. Ice cubes from standard refrigerator ice dispensers fit perfectly through the narrow mouth.
Patented narrow mouth design
Narrow mouth opening is 1.44"
Double wall vacuum insulated
Keeps beverages hot for 12 hours
Keeps beverages cold 24 hours
Won't retain odors
Lightweight and durable
Signature matte finish
Fits in most car, bicycle, and stroller cup holders and bottle cages