... silicone rubber( nontoxic:120°C±10 )Bottle :Inner is glass(High heat-resistant borosilicate glass:-40°C to +540°C) ... Bottle Thickness2.5mmBottle Diameter:54mmNipple Diameter:Wide ,narrow or flatPore Size:Small, Medium,Big avialableCapacity:120ML ,160ML,180ML,240ML,250ML ... disinfection before use.2012 Latest design Silicone baby bottle, feeeding bottle,good gift for baby !Should you have any questions, ...