I suppose we need either a Nectar Making or a soda Brewery skill. The nectar making skill should be the same as the sims 3, but i rather go for a Soda Brewery skill. As you advance in Soda Brewery, you will unlock new soda recipes and when it's maxed out, you can brew special moody sodas that boosts focus, inspiration and those other emotions.
http://the-1-great-fan.deviantart.com/art/Dr-Freeman-Soda-Bottler-By-Freeman-Enterprises-655194812
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Some possible soda flavors: Blackberry, Blue Raspberry, Cherry, Cola, Ginger Ale, Grape, Lemon-Lime, Lime, Orange, Peach, Pineapple, Raspberry, Root Beer, Strawberry
Maybe we could even use the produce we grow to make the sodas.