My mum used to make us lemonade and cola ice lollies in the summer but apparently you have let the drink go flat before you make them.

I have seen ice lolly kits in Coop.

Not sure about the use of alcohol, I guess it wouldn't freeze very well.

I remember filling a watermelon with vodka a couple of days before a barbeque a few years ago.

Slice a bit of the skin off, dig down a little bit, fill the hollow with vodka, allow to absorb, add a bit more, repeat until you think it's strong enough.

It's err.. interesting.