Legacy GM Objects with viscosity

I'm looking for advice or tutorials or anything in regards to creating objects that behave as if they are made up of viscous materials.
For example, if I wanted to make an ice-cream self-serve or a tube of toothpaste that I could empty.
I've had a quick play around but I can't get anything close and I'm not sure where to start.
 
Thanks for the suggestion, I have seen that before and did briefly consider it myself as well, but as good as it looks, it doesn't look like it can do what I want.
 
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