Well done to the OP for contacting Thornes about their new plastic polish containers, I really don’t think plastic polish containers is necessary now a days.
I don’t think Thornes argument about metal corrosion being a problem is actually the reason for them changing to plastic. I believe that decision has been done purely for a commercial reason due to bottom line product cost, because plastic containers are much cheaper containers to buy than thier metal equivalent ones and they are also cheaper to ship into them due to the weight saving plastic offers. If metal corrosion was an issue then why are so many acidic or alkaline products stored and sold in cans? Take Coke and Pepsi for example.
I just hope Thornes have done thier best to check before they bought the cheaper plastic containers and that they actually paid for the more expensive and fully recyclable plastic polish containers, rather than go for cheap non recyclable Chinese made versions.
We have been moving away from using plastic at our works for over 5 years. It cost us significantly but it’s worth every penny - and our customers think so too. We also use brown paper packaging tape rather than plastic, we use non plastic pallet wrapping on our pallets, we use no plastic banding for our boxes and pallets ( as the paper tape works on its own ) and we even use cardboard boxes that come from previously recycled cardboard, oh and we don’t use metal staples to hold the box lids together when packed we use our paper tape. Our average weight per box is 16.3kg - but we do pack up to 27kg items in single boxes every day. all of our goods are quite heavy inside the boxes but because we pay the best for the paper tape they hold together very well when they are shipped around the UK and Europe by courier every day.
Don't forget to take some non plastic containers to tip any milk into, it often comes in plastic containers.
Our local milkman and cattle / milk producer, finally stopped delivering milk 18 months ago after 75 years in the business put down simply because people did not want glass bottles anymore. He followed the supermarkets selling prices so it wasn’t a cost issue but he eventually gave up rather than move over to plastic bottles.
I do miss his old shaped bottles that I had used all my life till he stopped.
I have wondered this last few weeks if he had managed to stay in business if he would have started to see an increase in his sales now everyone is now focusing on how bad plastic really is.