Yes, it is single use plastic that's the main problem. Here's a thought though, every piece of plastic ever manufactured is still in existence! Makes you think doesn't it?
Shops are catching on though. Even Sainsburys in my area now allows you to take your own containers for the deli, fresh meat and fish counters, and their recycling plastic bag bin isn't just for used shopping bags. They accept all sorts of plastic wrapping, like that from toilet roll packs, bubble wrap, bread wrapping etc, just ask at your local branch.
We also have several shops that do a refill service of cleaning products and toiletries.
I couldn't get on with shampoo bars but happily fill up my bottle. I do use hand soap and find its kinder on my skin.
Slowly people are waking up. I just pray it's not a nine day wonder!