JSFiddle - React, Tailwind, and code Playground

HTML

<div class="bubble">Show more</div>

CSS

.bubble {
  position: relative;
  background-color:#eee;
  margin: 0;
  padding:10px;
  text-align:center;
  width:180px;
  -moz-border-radius:10px;
  -webkit-border-radius:10px;
  -webkit-box-shadow: 0px 0 3px rgba(0,0,0,0.25);
  -moz-box-shadow: 0px 0 3px rgba(0,0,0,0.25);
  box-shadow: 0px 0 3px rgba(0,0,0,0.25); 
}
.bubble:after {
  border-color: #EEEEEE rgba(0, 0, 0, 0) rgba(0, 0, 0, 0);
    border-style: solid;
    border-width: 26px;
    bottom: -52px;
    content: "";
    display: block;
    height: 0;
    left: 4em;
    position: absolute;
    width: 0;
}