There are many environmentally friendly alternatives, but
What is best - aluminum, cardboard, glass or recycled plastic?
Aluminum is a very durable material, but a lot of energy is used during production. The production of glass is also energy-intensive, and it is heavy to transport. Recycling plastic has a lower environmental impact than producing new plastic from oil, but it is not completely without environmental impact. Cardboard is a fragile material and must have a plastic coating to be waterproof.
Therefore, we have concluded that there is no optimal solution. There will always be something positive and something negative when choosing packaging material. The most important thing we can do as consumers is to reuse and recycle.