The best way to reduce plastic waste is handling with reusable packaging.
If the packaging has already been produced, we need to use it as many times as possible. This is the main idea.
As a consumer, you can use reusable bags, for example. But many products can't be purchased without any packaging. Without dispensing solution for laundry detergent, you can't buy it even in your bottle.
Until recently, reusable packaging mostly applied to reusable pallets, bulk containers, and wraps. But now, such companies as Loop and RePack have raised usual consumer packaging like bags and cans to new consumption levels.
If you are a local manufacturer and don't have enough resources to be a partner of Loop or other similar companies, don't be upset. You still have a chance to replace some percentage of your packaging with reusable products. For example, if you are a coffee roaster, clearly most of your customers are regulars. That means you can improve the consumer experience by offering coffee in reusable packaging with an improved look and functionality (for example, double-walled metal cans that keep coffee fresh).