I have a question about the recipe "Rhubarb and Rose Ramos Gin Fizz" from The Dog's Breakfast. How long would rhubarb syrup keep, refrigerated?
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You've strained out the fruit pieces, leaving juice, water, sugar. Place in a tightly sealed jar, and it will keep -- refrigerated -- for a couple of weeks easily. If it starts to cloud or mold, throw it out.