You might be familiar with double-tap actions for messages on other popular social apps like Instagram where the gesture ...

Emoji Kitchen lets you combine two emojis to generate a new mashup sticker. You can send them to your family and friends ...

One notable double bagel came in the 1981 Amelia Island ... The only issue with the emoji is that the bagel is cut in half and viewed almost horizontally, so it doesn't quite resemble a "0." ...