Here's all the different types of goop I've come across. There are more types out there, but this is all I've got my hands on so far.

Click on any picture for a close-up.

The legendary "Bug Bottles". They came in Vac-U-Maker sets, as well as some early Creepy Crawlers sets.

The 1965 bottles.

The "Teardrop" bottles from 1966. The first set of 4 is from Fright Factory, which included Fleshtone & Nite-glo.

Various other sizes. The Fighting Men Thingmaker set included the Giant Size 6.5oz Olive bottle.

Goop came on the card singly, and in 4-Paks.

Less common "Icky Yuk" goop, found in some, but not all, EEEEKS! sets. The boxes themselves advertised

having Icky Yuk Goop, but later the sets had a sticker covering that up, and included regular goop.

Goop? Sort of. These plastix "slugs" were used in the Mattel Injector sets: Hot Wheels Factory and The Western World.

They were melted in the Injector machine, and injected into 2 mold pairs, to make cars, horses, cowboys, etc.

When Mattel's goop supplies dried up, others filled the void. "Rigid Glop" on the left, and "Liqua-Bug" on the right.

Liqua-Bug picture from the Mike Speth collection.

Two more great bottles: "Glop" & "Gunk-O". Both from the Burt Buchanan collection.

Mattel's Thingmaker II goop from 1978. The right 3 are on "Flower Fun" cards.

Mattel's Chill-A-Tron "gooze" for the 90's.

Toymax's goop for their successful revival of the Creepy Crawlers line for the 90's.

Works great in Mattel's old molds too, but only in the newer ovens. The old hotplates can get too hot for the new goop.

Toymax goop came in many shapes, sizes and types. The Metallic goop is great for bug's wings! The Glow goop is one of my favorites, adding spookiness to any mold. Anyone get the Stretch goop to work, without the creature falling apart at the slightest pull? I would have liked to see that stuff work out. Seemed like a cool idea. Hopefully Flying Colors will bring the Goop FX backing stores, in many colors, because the detail you can get with those "pens" is incredible!

Toymax’s 5-Pak and Goop FX Pens