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Mixers
It might be a good idea to keep mixers on hand. A few small bottles of cola, soda, and tonic should suffice. If you have a cart or cabinet consider devoting a section to mixers. Glass bottles always look nicer and they can be found in the alcohol section of the grocery store. It’s always nice to have a good ginger beer on hand to mix with whiskeys or to make a Moscow Mule. Get creative.