Hello and Welcome Mrs Ocean,
First I would like to welcome you to the forum. It is great that you are picking up crocheting again.
For itmes that take multiple skeins of yarn I think the 2 liter soda bottles are a great idea. You can cut out the bottom about an inche up and put the skein in thread it though the spout and than tape the bottom on, just to keep the yarn in. Place these in a knitting basket or bag and you would have your yarn ready to use with no tangles.
Today the large coffee cans are great also when you are working with balls of yarn. Wash, dry and cut a hole in the top. Place ball inside and you are good to go.
These are thrifty ways to make your own. Or of course you could buy the ready made holders. I find these work just as well.
Thanks for posting.
Linda