We ordered some cotton shopping type bags from Amazon quite cheaply and just named and decorated them with Sharpies. We have made over 30 over a couple of years, mostly containing a book and a linked Orchard game, a laminated rhyme sheet, small world toys - anything we had going spare really. We didn't use our best books and the games were either duplicates or from charity shops.
You can see some of them here
https://www.townstreetplaygroup.org/supporting-your-childs-learning/home-learning/
They were all stored away because of Covid but we are planning to bring them back for parents to borrow soon
Parents generally take care of them but we do tell tham that they are there to be borrowed and used.