This is a easy and cheap way to make an old dog toy fun again.
Step 1: Supplies
A empty water bottle
An old dog toy (without stuffing)
A knife (if there is not a hole in the dog toy already)
First cut a hole in the middle of the toy, so the bottle doesn't come out. Then just put the bottle in the old toy.
Then your done and your pet has endless hours of fun. (Replace the bottle when it begins to where, to keep the fun going!)