This is a 500 ml (16.9 oz) double walled stainless steel, two mouth bottle. One mouth is small enough for drinking and the other is large enough for adding ice. Fits in car cup holders with a set of interchangeable carry straps in 8 colors. Water bottle is dishwasher safe, top rack only. Bottle is brand new in the box and has not been used. Do not use bleach or cleansers containing chlorine to clean the bottle as these may ruin it.