how to add vertical line between two divs

I want to make a vertical line between two divs. we have hr for horizontal line but none for vertical line as I know. Is there anyway to make it without using border?

<style>
#wrapper_1 {
    background-color:pink;
    height:100px;
    float:left;
    width: 100px;
}

#wrapper_2 {
    background-color:brown;
    height:100px;
    width: 100px;
    float:right;
}
</style>

<div id="wrapper_1">
    Creating slideshows PHP
</div> 

<div id="wrapper_2">
    Creating slideshows with WordPress 
</div>