ThinkGeek offers the Iron Man 3 Men's Tony Stark Light-up LED T-Shirt in Black for $5 plus around $7 for shipping. That's $15 under our February mention, the best price we've seen, and the lowest total price we could find now by $14. It comes in size XS only, L, or XXL, and probably seems like a better idea in theory than in practice.

Coming soon: a Pepper Potts T-shirt that disposes condiments and spices.

Update: Add coupon code "LABSHOTS" to get a set of Laboratory Shot Glasses for free.