Nalgene Wide Mouth Sustain Silo Bottle 48oz Grey 48oz. It is leak proof and easily slides into standard packs and backpack side pockets. It is very durable and has the standard 63mm Loop-Top cap. The neck configuration works with most major water purifiers and filters. Sustain bottles are made with material derived from 50percent plastic waste. Each bottle is created from resin powered by next generation recycling technology that transforms plastic destined for landfills into high-performance bottles. Specifications for Nalgene Wide Mouth Sustain Silo Bottle 48oz: Manufacturer: Nalgene Fabric/Material: Tritan Renew Volume: 48 oz Weight: 7.375 oz Capacity: 48 oz Package Contents: Nalgene Wide Mouth Sustain Silo Bottle 48oz Nalgene 2020-0148: Wide Mouth Sustain Silo Bottle 48oz Grey 48oz