How to create a div with pointy edges?

Question

can you help me to make like this div:

My Code:

body{
        display: flex;
        justify-content: center;
      }
      #talkbubble {
      width: 160px;
      height: 80px;
      background: #bc0a14;
      position: relative;
      -moz-border-radius: 10px;
      -webkit-border-radius: 10px;
      border-radius: 10px;
    }
    #talkbubble:before {
      content: "";
      position: absolute;
      right: 100%;
      top: 26px;
      width: 0;
      height: 0;
      border-top: 13px solid transparent;
      border-right: 26px solid #bc0a14;
      border-bottom: 13px solid transparent;
    }
    #talkbubble:after {
      content: "";
      position: absolute;
      left: 100%;
      top: 26px;
      width: 0;
      height: 0;
      border-top: 13px solid transparent;
      border-left: 26px solid #bc0a14;
      border-bottom: 13px solid transparent;
    }

<div id="talkbubble"></div>

I want to create this div with the same style in the image

Answer 1

here is an idea with pseudo element and radial-gradient. I used CSS variable to easily adjust the shape but it's not mandatory

.box {
  width: 100px;
  height: 50px;
  margin:0 var(--w,20px);
  display:inline-block;
  border-radius: 15px;
  background: var(--c,red);
  position: relative;
}

.box:before,
.box:after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: var(--w,20px);
  right:calc(100% - 2px);
  background:
   radial-gradient(107% 100% at top    left,transparent 96%,var(--c,red) 100%) top, 
   radial-gradient(107% 100% at bottom left,transparent 96%,var(--c,red) 100%) bottom;
  background-size:100% 50.1%;
  background-repeat:no-repeat;
}
.box:after {
  left:calc(100% - 2px);
  right:auto;
  transform:scaleX(-1);
}

<div class="box"></div>

<div class="box" style="--c:blue;--w:30px;"></div>

<div class="box" style="--c:purple;--w:10px;height:60px"></div>