Source: http://knockknockstuff.com.© KnockKnockStuff.com. License: All Rights Reserved.

Knock Knock has provided witty and irreverent products for homes and offices since 2002. Founded by the witty and irreverent Jen Bilik in 2002, the company now employs about 24 people.

Note the very irreverent border design in gray on the 'Indelicate Doilies', featuring Unicode U+1F595.

Source: http://knockknockstuff.com.© KnockKnockStuff.com. License: All Rights Reserved.

Source: http://knockknockstuff.com.© KnockKnockStuff.com. License: All Rights Reserved.

Source: http://knockknockstuff.com.© KnockKnockStuff.com. License: All Rights Reserved.

Source: http://knockknockstuff.com.© KnockKnockStuff.com. License: All Rights Reserved.