[header] How to store simple syrup [title] Put simple syrup in an airtight container. [step] Choose an airtight container with a tight-fitting lid, like tupperware or a glass bottle, to reduce the syrup's exposure to oxygen. Don't choose glass if you plan the freeze the simple syrup, however. 
[substeps] A bottle with a pour spout is perfect for adding simple syrup to cocktails. Exchange the spout for an airtight lid when storing the syrup in the fridge.