Buy it here for $29.99 in yellow gold, rose gold, or silver on Etsy.
Who knew herpes (pictured right) could be so cute! Buy them here for $9.99, and find the entire collection on Giant Microbes.
27. X-Ray Oven Mitt
Squeeze and the bubonic plague comes to life. Buy them here for $4.99 from ThinkGeek.
UPDATE
You can buy the Brain Freeze ice cube mold from Fred & Friends. A previous version of this post linked to an alternate seller.