This NY Times article does not specifically mention beer but it does show that outside the container thinking should not be relegated to glass vs can.
What type of packaging can be sustainable, or recycled more while also not breaking the budget of a small brewery. Is there an earth substance that can be harnessed to block light and be light like a can without the drawbacks of that metal? And can that be made without damaging the food supply.
Something to ponder as you pull a beer from the ‘fridge. Would you drink a beer that was put into a package made from mushrooms, or kelp?