Eko Bottles are made of high quality food grade 18/8 stainlesssteel.<br>Single Wall Food Grade 18/8 Stainless Steel<br> Wide Mouthfor Easy Cleaning and Adding of Ice Cubes<br><br>Wide Mouth Opening , 1.75" Wide(480mm)<br><br>Capacity : 650ml / 22 oz<br><br><br><br><br>