Knock Knock is celebrating Memorial Day with free shipping (no minimum purchase amount) through Monday, May 30, 2011! Use coupon code: HOTDOG at checkout.

Reminder: Knock Knock is the brand behind the snarky post-its and epically funny notepads (& the super-useful “All Out Of” shopping notepads). Happy shopping!

Other promo codes:

BLAH – April 18, 2011