The Boxed Roll of Liner Trash Bags 50 Count Each (10-15 Gallon) is necessary if you are going to keep your playground clean. Not only are these trash bags necessary if you have a pet station, but they are also necessary when you have a park that is visited frequently. In order for people to be able to keep your playground clean, they will need somewhere to put your trash. By purchasing this many trash liners, you can ensure that your playground is kept clean at all times. You can also ensure that people always have somewhere to put their dog waste when they have picked it up, too. Set a good example to the kids and ensure that they have somewhere to put their trash. This pack gives you more than enough trash liners!