Firstly, the cost of more environmentally friendly packaging materials and transportation will increase. If a brand's original pricing is relatively low, when the brand switches to more environmentally friendly packaging materials such as glass or PCR plastic, the product price will rise. Will existing consumers be willing to accept the higher price? https://www.quora.com/What-are-the-biggest-challenges-in-switching-from-plastic-to-more-eco-friendly-packaging-options-like-glass-or-paper