Non-literal reading

It was about a week ago while I was taking a shower that I sought for a shower gel. There was a big bottle, with a shape that has usually contained shampoo. At first glance, I thought it was the same bottle, refilled with shower gel. Used that. Then I checked the label and read "shower gel or something", which confirmed the hunch. Several days later dad mentioned that he had refilled the bottle with shower gel. I said "Thanks, noticed already". Yesterday, when I read the label on that bottle filled with shower gel, it said "some cleansing gel for hair of sorts". I wonder where I had read that it was shower gel. In other words, from the label on bottle, I read what was in the bottle, not what was actually written on the label.