Sterilise a 1.5 litre preserving jar (see tip, left). Tip the raspberries, sugar and vanilla into the jar.
Pour half the vodka into the bottle. Seal the lid, then turn the bottle upside down and give it a good shake to evenly distribute the sugar. Remove the lid and add the remaining vodka.
Ensure the bottle is sealed and store in a cool dark place, turning/shaking once a day for the first week. After 2-3 weeks you can strain the vodka through a sieve lined with coffee filter papers or a clean kitchen cloth. Pour the vodka back into mini bottles and label. The vodka will keep its pink colour for a few months, but will be drinkable for 2 years.