what is a good Root lifter?

[loving my life<3]

I recently had my hair cut, and I love it!

When she straightened my hair out though she put root lifter and mouse in it! And it looked incredible. It wasn't super flat like normal.

I bought some mouse, no problem..

But where can I get root lifter? And what brand is best?

Just something decent.. I could have bought it there.. but it was like $20.. I figured I could get it MUCH cheaper some where else..

Thanks!!