Features of Hydro Flask Beer Growler 32 oz: Hydro Flask created the first stainless steel insulated growler on the market Fresh Carry System keeps beer cold and carbonated for hours Streamlined handle for easy one-handed pour Smaller size is ideal for stowing in a backpack - (why limit yourself to just one craft variety!) TempShield protected Keeps cold up to 24 hours Keeps hot up to 6 hours 18/8 pro-grade stainless steel BPA-free and phthalate-free