Lifeline 18-Ounce Stainless Steel Colored Bottles, Blue. Keep yourself hydrated with the Lifeline stainless steel water bottle, which now comes in a variety of colors. Lifeline SS bottles are made from #304 stainless steel, the material of choice in the food processing, dairy, and brewery industries. Stainless steel is easy to clean, durable, inert, sanitary, toxin-free, and non-leaching. It's also toxin- and BPA-free and recyclable.