My favorite cocktail is a gin and tonic. But sometimes, even if I use extra-fancy tonic water and good gin, it feels like it just needs a little bit more. Sure, a lime will do, but what about something a touch different? Something that could transform it into a party-ready cocktail rather than the quiet cocktail I sip on Sunday evenings. The answer to this dilemma is a slew of cucumbers — oh, and a big ol’ pitcher so that it can be batched and served up to whatever thirsty crowd you happen to invite over.