
Reusing is the second component of the Three R's of Recycling [reduce, reuse, recycle]. I love to reuse or re-purpose containers (or anything, really) and make them useful beyond their regularly expected lifespan.
I recently began reusing glass soy sauce bottles for canola and olive oil as well as for balsamic vinegar. Once I finish a bottle of soy sauce, I run it through the dishwasher to clean it out thoroughly and fill it with various liquids.
The top picture shows the bottle with canola oil. It's handy because the spout/pour top looks like this:

That top allows me to pour oil in a controlled way for cooking or oiling pans. I use the same bottle for balsamic vinegar:

And I used a glass Crystal Louisiana Hot Sauce bottle for olive oil.
I am rather obsessed with reusing any and all glass containers: pickle jars, salsa jars, any condiment jar. They are great for storing soups, dry beans, flour, sugar, leftovers. Plus, if I get sick of them, they can still be recycled.