I have the 20oz black bottle (it came in a bundle, and I did not chose this color) and it is very difficult to read the measurements. I actually measure my liquid with a measuring cup before pouring it into the blender to shake. Nice bottle, but don't get the black.
I take my bottle with me everywhere. It's a great size and works wonderfully.
I ordered both the 20 oz and 28 oz. Both are great for different products! I prefer to have the smaller one for most of my shakes, as it feels somewhat wasteful to have a huge container with a tiny shake in it
Never did like the large bottles when you only use 8 oz, so this blender bottle is perfect