Looking around internet one can find many creative ways to avoid the use of plastic in liquid containers. One that attracted my attention was the "paper bottle".
The package utilizes sustainable sheet stock of bamboo, palm leaves, etc. or other ecologically friendly material that is pressed into two halves to create the mechanical resistant part of the liquid container.
The tricky part is always the liquid/oxygen barrier to keep the liquid inside and in good conditions until consumed.
The creative part comes from encapsulating a very thin film polylactic acid as a liquid/oxygen barrier. Polylactic acid is a biodegradable and bioactive thermoplasticaliphatic polyester derived from renewable resources, such as corn starch.
A patent of the invention is here: http://www.google.com/patents/US8701905