How to make a fruit fly trap

Some of my more worldly friends raised their eyebrows when they saw this contraption sitting on my kitchen table. Of course, I had to assure them that my homemade fruit-fly trap is all above board and doing a marvellous job of protecting my $2.50 pomegranate (this week's decadent fruit treat!) – plus Pop, who's 88, gave me the instructions, so enough already!

Here's how to make a fruit-fly trap: take a soft-drink bottle, remove the lid and cut the neck off; take another bottle and use a sharp knife to cut a round hole in it. Insert the bottle neck into the hole in the other bottle, and chuck in a piece of fruit. That's it! The flies can get in, but not out. – Pru

PS To despatch the blighters more quickly to that big fruit bowl in the sky, forget the fruit and carefully pour in a cup of water, a splash of bleach and a teaspoon of vanilla essence.