I just label the ones i give away.If you bottle alot its more time spent than looking at the bottle a minute or two if that while drinking it. I just code my caps.When I pour in the glass,I then just have rinse out for next use.If you enjoy making them for all the bottles and dont mind then have at.Over time you may find its another step to do if you brew often and find the short lived satisfying visual not worth it to yourself but to show off to others makes for a more enjoyable experience for you and them.Then they will want all of your beers and take your much needed bottles.Ha