It’s simple to say that eco packaging is entirely about the environment. It also should take into consideration economic and social factors.

For example, plant-based packaging may seem like a viable option. But quite often that means clearing endangered rainforests to grow crops.

Eco packaging needs to consider the economic factor. It needs to be priced competitively over traditional oil-based/single-use packaging options.
So yes, the definitions can get a bit messy at times!

A fancy label that says ‘eco-friendly’ doesn’t mean that it’s sustainable. Similarly, labelling something as sustainable doesn’t mean that it’s ethical.