Feed bags! I keep seeing people say they don't have need of them, gosh I wish we were neighbors!
Ok, first, they line (or are) my laundry hampers. I have a few because my spouse leaves clothes EVERYWHERE so I need them in many rooms
Next, they are windproofing for the chicken coop, and I will staple them to surfaces that will be 'poop-ed' on to make cleaning easier.
Next they are liners for garden boxes because you should not plant into wood containers if you use recycled wood, or cedar, or treated wood (etc etc) as they leach into the soil. Regular plastic is less durable to me, the Purina feed bags I have the picture eventually comes off, but so far the bag stays good.
By the way, toothbrushes come in wood now, so plastic is not necessary. I have been using them for a while and they work fine. (It is a low bar for a toothbrush to meet

)
I use recycled plastic containers for all the chicken bowls. I reuse glass jars to make sprouts. (Half fill the jars w grain and put them on a shelf. Then fill a water when needed, 24 hrs (or 48 if you forget, which I do often) drain out the water. Rinse out daily, they sprout and then feed to the girls in various stages of sprouts. Having many going is easier and the small jars pre-filled goes faster than trying to do it in basins and buckets. I find I get less mold or other issues in glass jars anyway. The odd time you forget one and it spoils you only lost a cup or two of grain.
Old clothes are rags (of course) super useful for washing out chicken coops and you can let them dry and put them in the fireplace when they are no longer washable.
Everything chicken poo is the best compost EVER, if you have issues w smell or flies or volume, put the poo in a bucket, cover w water, in a few days it will ferment and you can use it to water on a plant without burning the roots. I don't know about pathogens, so I use it on plants not currently being eaten (fruit trees when they are not making fruit, flowers, or garden beds not currently growing anything, or far from time of consumption)
Gosh, I am full of ideas, so if you have a pile of something, just tell me and I'll give you ideas

I am great at reuse.
By the way, feel free to offer barter to people. My spouse fixes tractors and such (he grew up on a farm, this wasn't his living, he just does it whenever needed), he would and does trade for other materials in a heartbeat but few people think to offer.
Oh! And you can plant in feed bags too! Or put leaf bedding and a little water + grains and it will sprout!