I know what you are talking about I was really little but I thought they were called bloodsuckers. I can't find information on them though.

They indeed were called Blood Suckers. There were two molds, one a vampire bat looking thing and the other a mosquito. The mosquito mold came in green and pink and the bats in dark gray and purple. The figures were a rubber substance with the point of the pen in their mouth. Their 'tails' were the clear plastic section with the "blood" in it, surrounding the ink chamber. They functioned much like the 'baby bottle' toys do in that when you had them positioned with the head up the tail would 'fill' with blood, and as you wrote with the head down, it looked as if the blood was draining out as you wrote. They were cool. I had all four.

THANK YOU SO MUCH BEEN LOOKING FOR THE NAME FOR YEARS NOW. WOW AMAZING ANYBODY REMEMBERS THESE

I remember these I telling my wife about she neber heard of them

I remember those, I was born in 1980 so i must have been about 7 or 8.. i had the purple one. Grew up In Pawtucket RI.

I would love to get a copy of that original bloodsucker commercial. Does anyone know how to find it?

Awesome that you remember what these even were! I had the green mosquito pen when I was in elementary school 30 years ago. Coolest pen ever.