Hydro Flask 12 oz Insulated Food Jar Black. insulated food jar is made to go anywhere. TempShield keeps food fresh and the soft grip lid seals tight and is easy to open. Specifications for Hydro Flask 12 oz Insulated Food Jar: Manufacturer: Hydro Flask Volume: 12 oz Color: Black Fabric/Material: 18/8 Pro-Grade Stainless Steel Weight: 0.8 lb Diameter: 4.25 in Finish: Powder Coated Height: 3.5 in Package Contents: Hydro Flask 12 oz Insulated Food Jar Hydro Flask RF12001: 12 oz Insulated Food Jar Black