Custard for me.
Popsicle is the American word for what I think in the UK is called an "ice lolly". Here in the Antipodes it's often called an "icy pole" or an "ice block". I wasn't sure which word to use, so I just guessed that most people would know the American one.
Fizzy drink or soda/pop? 
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It is easy to go down into Hell;
Night and day, the gates of dark Death stand wide;
But to climb back again, to retrace one's steps to the upper air –
There's the rub, the task.
– Virgil, The Aeneid (Book VI)