We are all little Architects.
When you were a child, you played Lego and create our "own" spaceship, our "own" car, out of your imagination.
<> And Today's children still love Lego. Lego Video
<> And you as an adult still love Lego. That's may be why you play again now with your children... or you found the video game Minecraft so fascinating ! Minecraft Video
<> And may be you did spend some time building a Christmas Tree out of beer bottles (*But that's another point, please drink responsibly*) Christmas Tree Video
The norm of the packaging for our plastic bottles isn't unchangeable.
Coca-Cola consumers could build structures if all Coca-Cola products (Coca-Cola Red, Zéro, Light, Fanta, Sprite, ...) looked like Lego pieces : PET 50cl, 25cl, 12,5cl, 1,5L, 2L, etc. They would even take photos and share their "trophies" online. From a marketing point of view, the potential virality is big. Also, if we add a purpose to a product, we put away the price in people's mind = growth of sales
For the collectivity, collecting and sorting would be easier because already done. This triggers off that for recycling indutries it would also be easier.
My vision :
going to Disneyland with my family, all drinking Coca-Cola products and then building as a creative activity something from the ground (a tower, a car, ...). Take a picture with all my family in front & share it online. Be proud. Leave the construction like this, on the ground. Wait for other people to use our pieces for their imagination, all day long. At the end of the day, people responsible for cleaning Disneyland would collect altogether the empty plastic bottles, one shot !