

I hadn’t seen that before, that is interesting. These detergent sheets are quite a bit cheaper though, and have no plastic in the product or packaging. We love them!
https://www.amazon.com/Poesie-Eco-Friendly-Plastic-Free-Biodegradable-Hypoallergenic/dp/B09VPDX476
That is so cool! Did a bit of searching, this looks like like a good place to start. I’m not visually impaired, but am still very interested in learning to echolocate!
National Library of Medicine
EchoRead Programme: Learning echolocation skills through self-paced professional development during the COVID-19 pandemic
https://pmc.ncbi.nlm.nih.gov/articles/PMC9623408/