Summarize the following:
Use 0.5  tsp (2.5 mL) of each extract. Choose a glass or pitcher that can hold at least 24  fl oz (710 mL) of liquid. You can try adding the extracts directly to a 20  fl oz (590 mL) bottle of cola, but it’s easier to combine the ingredients thoroughly in a separate container. There is some debate concerning the exact type of cola you need to use for this recipe to turn out right. The majority opinion is that Pepsi works better than Coca-Cola or any other off-brand cola variety. You can experiment with different types, however, and make that determination for yourself. Use cold cola, if possible. That way, you won’t need to chill the finished drink before enjoying it. Swirl the drink around quickly with a long spoon or a straw, then give it a sip. If you want a sweeter taste or a stronger flavor, stir in an additional 0.25  tsp (1.2 mL) of one or both extracts to the drink. Alternatively, if the extract flavors are already too strong, you can stir in another 0.5  c (120 mL) of cola or soda water to the drink. You may need to transfer the drink to a larger container, however. If your soda is already cold, you can enjoy it as-is. If not, add a few ice cubes and give it another stir. Or, cover the glass or pitcher with plastic wrap and refrigerate the drink until it feels cold enough to enjoy as usual. Covering the drink while chilling it will keep it from going flat.

Summary:
Add almond and vanilla extracts to a large glass or small pitcher. Pour 20  fl oz (590 mL) of cola into the glass or pitcher. Stir the mixture and give it a taste test. Enjoy your homemade Dr Pepper chilled.