Flowers in a vase can be enjoyed for a few days longer if you give them the right additive.

 

 

The sugar content in lemonade or cola keeps the flowers fresh for longer. So you don't need to throw away stale soft drinks, just pour them into your flower vases. About 100ml per vase mixed with the flower water is enough.

For glass vases, it's best to use clear soft drinks such as Sprite or 7up.