I blogged about these WWII slogan posters already, but here is the t-shirt version from UK streetwear company Yes No Maybe. There are some t-shirts available from other companies, but not with the bold lettering and font that these t-shirts have. Men's and women's styles available in black (shown), blue, red as well as black with gold lettering (£26.00).
This is a great shirt for men from McSweeney's ($22). I used to live right across the street from the La Brea tar pits in Los Angeles, so this shirt brings back fond memories.
Here is another shirt from McSweeney's that I love. This one is available in both men's and women's sizes ($22). The saying echoes my sentiments exactly!
Etsy is an amazing source of original graphic tees from artists all over the country. I love this the double colt t-shirt ($34) from 1 A E O N which is available in a variety of colors.