Lemons deserve a lots of praise for their many uses. They serve as a cleaning product, flu fighting medicine and cooking ingredient, all without harming the environment. I personally use lemon juice for all of those things quite often, and therefore find Citrus Spray quite a useful object, even if it looks quite gimmicky at first.
Citrus Spray was designed by studio Joan Rojeski (known for their handmade eco-designs) and Alberto Arza for the Spanish cookware brand Lékué. It comes in two sizes; the big one for lemon, grapefruit and oranges and the smaller one for limes and mandarins. Citrus Spray is dishwasher safe and available for 15€ via Lékué.