Does anyone know the difference of the two? Has anyone ever sent cakes using this product?

Without doing any research (which maybe that means I shouldn't even be replying, ha!) aren't they two completely different products?

Did you see something referencing using those for cake shipping? Interesting!

Dry ice will freeze cake solid quickly and if the cake is dropped, it will shatter. Dry ice is dangerous because it can cause serious burns when handled with bare hands.

Hot ice gives off heat if we are speaking of the same thing! You wouldn't want to pack a cake with that. It's formed from a chemical that when super saturated, the cooled down product will give off heat when activated.

I would think standard cold packs in a cooler would be a much safer shipping method!