Text within a non-rectangular shape (pentagon or h

Effect I want to achieve:

Very similar questions:

How can I wrap text around a non rectangular image? - but the other way around (they want to wrap text around, I want to keep text inside)
Wrapping text around non-rectangular shapes css/html

Potential solutions:

http://www.csstextwrap.com/ - a bit dated - mentions IE6 and Netscape, does not mention Chrome
http://baconforme.com/

As in Novemeber 2015 - can we do better than that?

I managed to find this article about CSS shapes - http://www.chenhuijing.com/blog/why-you-should-be-excited-about-css-shapes/ - but they are not ready for prime time yet - http://caniuse.com/#feat=css-shapes - no IE, no Edge, no Firefox...

Considering the shape you are trying to achieve, the shape-inside property would provide a solution but unfortunatly, no browser I know of supports it today.

Another approach would be to use the shape-outside property which is currently supported by modern webkit browsers only :

p{
    width:400px; height:400px;
    text-align:justify;
    overflow:hidden;
}

span:before, span:after {
  content:'';
}
span:before{
    float:left;
    width:200px; height:400px;
    -webkit-shape-outside: polygon(100% 0%, 0% 40%, 50% 100%, 0 100%, 0 0%);
    shape-outside: polygon(100% 0%, 0% 40%, 50% 100%, 0 100%, 0 0%);
}
span:after{
    float:right;
    width:200px; height:400px;
    -webkit-shape-outside: polygon(0 0%, 100% 0%, 100% 100%, 50% 100%, 100% 40%);
    shape-outside: polygon(0 0%, 100% 0%, 100% 100%, 50% 100%, 100% 40%);
}

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For browser support, see canIuse