How do I model this jello mould?

I’m no so good at modeling. I don’t even know where to start. I want the curves to be soft like they are with that jello mould. I tried making it with booleans, but the edges where the objects intersect aren’t smooth. I guess what I need to know is, what method should I use? Subsurf? Thanks in advance for any tips.

something like this maybe…

you could also model one segment and use the spin dup !

happy bl