How to place two containers in bootstrap side by side?

I try to place two containers side by side, but they are stacked on top of each other. Even container-fluid class doesn't help.

<div class="container-fluid">
    <div class="row">
        <div class="col-lg-12">
            Container Left
        </div>
    </div>
</div>

<div class="container-fluid">
    <div class="row">
        <div class="col-lg-12">
            Container Right
        </div>
    </div>
</div>

Is it possible in Bootstrap?