I love repurposing bottles and jars. I mostly use them to store beans, rice, noodles, and seeds. They're also nice to have around for craft supplies, iced tea on the go, or canning your own food. I have tried many suggested methods of removing labels and all resulted in tired arms, scraped up hands, and way too much use of my time. I've also often had bottles with labels that I couldn't budge. So in combining some of these techniques and my avoidance of harmful chemicals and goo removers, I came up with this method that so far hasn't failed me yet.
You'll need good dishsoap, stainless steel scouring pads (not wool!), vinegar, and a putty knife or scraper with a razor and of course your labeled bottles. Place your bottles (lids off!) in your plugged sink or dishtub and add your soap, about a teaspoon or 2 count pour, and about 2 tablespoons of vinegar.
Fill with hot, hot water until the bottles are covered. You may use gloves of course but make sure your bottles are filled with water and not floating. As you see my pickle jar is but it was just for the picture of course. Let these sit for a few hours. I've also left mine overnight or while I'm at work.
Next grab your putty knife or scraper and start pushing the label off from top to bottom. It should come off very easy. Paper labels as you see here are cake, if you have a plastic label you may need to lift up enough so you can pull them of in strips. And in the case of a Kombucha bottle you'll have to pull the label of first soak for five minutes more and repeat the scraping process, still very easy.
Next take your scouring pad and a dab of soap and gently scrub the remaining glue or labeling off and rinse. While rinsing rotate your jar around and you'll be able to see any remaining small bits you may have missed. The only bottle I ever had trouble with was a Snapple bottle that had some crazy industrial glue for which I just drowned with scalding hot water while scrubbing. Still it was easy to scrub off. Now you have to be patient and let them dry.
You're Done! Without scratches, scrapes, or exhausted arms you now have clean bottles and jars ready for repurposing. You could even paint the lids matching colors or for the skilled domestic types etch your jars with a pattern or your own label for a classy touch! Enjoy!