Dots Ice Cream Mold - Diy Dippin Dots without Liquid Nitrogen

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I love Dippin' Dots ice cream but I just can't bring myself to shell out $12 a pint for milk and sugar. I'd like to make them myself, but I don't usually have liquid nitrogen just lying around my house. Since I work with foundry equipment all day, it wasn't long before I asked myself 'why not mold the ice cream?'? Unfortunately, I haven't yet managed to get the dots out whole because I only have ABS right now. (The picture I took makes it look worse than it actually is, and it could be improved with a bit of tweaking.) I've tried hot water (which hurt), nonstick spray (which helped), and hitting it really hard and yelling at it (which didn't help). I'll be trying an acetone smoothing next, but any new ideas are welcome! This would definitely work much better if made out of a flexible material like silicone rubber. The funnel valve assembly does work well though; it holds water leak-free! In any case, I've included a tasty ice cream recipe in the instructions tab.