body {
  display: flex;
  height: 90vh;
  align-items: center;
  justify-content: center;
}
.bubble {
  position: relative;
  width: 200px;
  height: 100px;
  margin-right: 50px;
  padding: 10px;
  color: #fff;
  background: #00bce4;
  border-radius: 5px;
}
.bubble:after {
  content: "";
  position: absolute;
  left: 100%;
  bottom: 15px;
  width: 0;
  height: 0;
  border-width: 8px;
  border-style: solid;
  border-color: transparent;
  margin-bottom: 50px;
  border-left-width: 15px;
  border-left-color: currentColor;
  color: #00bce4;
}
.box-shadow {
  box-shadow: 0 0 10px #000;
}
.drop-shadow {
  filter: drop-shadow(0 0 10px #000);
}