Make your own vanilla extract - using those vanilla pods that you have used for custard! This extract is far nicer than the synthetic flavourings you can buy in the shops, and a fraction of the cost of shop-bought extract!
Brandy or vodka
Pack the pieces of vanilla pod into a small bottle. Fill the bottle with vodka or brandy. Store in a cool dry place for several months.
Strain off the liquid through paper towels. Now you have your own vanilla extract!