There's a well-known tourist trap here in the Boston area that
includes a smoothies stand, and the above ingredients ("coconut" being
coconut milk) are the main ingredients for that "twist" drink. (It's
the only drink where they give out free samples. Delicious!)

Anyone care to estimate what the proportions should be? (I think it's
just pineapple juice, not pineapple chunks.) Thank you.

Lenona.