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These are some of the best I've tried and they do a combined 2-in-1 shampoo and conditioner bar, so great for saving space, time and water - recommended!
You can get them online in the UK
https://thesolidbarcompany.com/collections/shampoo-conditioner-bars
or in the USA...
This site is run by Ivar at in Santiago de Compostela.
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