I have another use for them. I like to knit so I cut the 2 liter bottle almost in half, put my ball of yarn in it (making sure it is clean and dry first) after dropping the end of the yarn through the neck of the bottle. Put a piece of duct tape just big enough to keep the bottle from opening again and voila, I have a way to keep my kitty knitters away from my yarn! And saved money because you can buy a similar device but they are usually over $10.

Great tips, thank you :D:D:D