Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: EcoUsable 16 oz Stainless Steel Bottle - Black
Product description: EcoUsable water bottles are the new eco-friendly alternative to using plastic water bottles. Each 16 oz. Stainless Steel Water Bottle is reusable, lightweight, and taste-neutral. It comes with a loop cap made from safe, non-leaching polypropylene and a color coordinated carabiner.Features * NEW Improved Design! * safe alternative to plastic * high-quality food grade 304 L.N. stainless steel * durable, lightweight, reusable and 100% recyclable * slim design fits most cup/bottle holders * non-leaching & toxin-free * no inner lining, clean tasting * non-slip base * holds 16 fluid ounces (473 ml) * measures 8.5" H x 2.56" W * weighs 4.5 ounces
Product feature: safe alternative to plastic, high-quality food grade 304 L.N. stainless steel, durable, lightweight, reusable and 100% recyclable, slim design fits most cup/bottle holders, non-leaching & toxin-free
Product brand: EcoUsable
Target attributes: Material
Answer: attribute: material
value: stainless steel
source: product feature
attribute: material
value: stainless steel
source: product description
attribute: material
value: stainless steel
source: product title