Ant mailer

You're referring to an "ant mailer"!

An ant mailer is a type of direct mail piece that is designed to look like an ant crawling across the surface of the mailer. It's a creative and attention-grabbing way to deliver a message or promote a product.

Ant mailers typically consist of a flat, rectangular piece of cardboard or paper with a design that resembles an ant crawling across the surface. The ant is usually depicted in a humorous or playful way, with exaggerated features and bright colors.

The idea behind an ant mailer is to create a sense of surprise and delight when the recipient opens the mail. The unexpected design and playful theme can help to grab attention and make the message more memorable.

Ant mailers are often used in marketing campaigns to promote products or services that are fun, playful, or quirky. They can be especially effective for reaching a younger audience or for promoting products that are designed to bring a smile to people's faces.

Some examples of ant mailers include:

Overall, ant mailers are a fun and creative way to deliver a message or promote a product, and can be an effective way to stand out in a crowded mailbox.