[sykic]

Plastic is not a great material for the environment and your comment illustrates the crux of the issue for humanity. We tend to optimize for local maxima and not global ones. As other commenters have pointed out pricing in externalities would be a great step forward. Plastic shampoo containers may not be so great in your eyes if their cost became prohibitively expensive.

[triplewipeass]

Plastic is a great material for some uses, but it’s also a very durable material. I’d love to purchase shampoo in the form of a refill of the plastic shampoo bottle I’ve already purchased some months ago. Why buy a new bottle every time? That’s the part which doesn’t make sense.

[emiliobumachar]

What would the refill package look like?

[205guy]

A large vat at the store, with a spigot to refill the bottle you brought with you. I've seen this for cooking oils and honey, not sure it exists for cosmetic products.

[kalleboo]

Same way a glass shampoo bottle refill package would look like?