This thing is awesome. Its like a little hat for your water bottle. A little hat that juices lemons. Can it juice limes? Not sure yet, but my money is on ‘Yes’.

From Amazon:

Add a splash of citrus to your beverage with this easy-to-use Sombrero bottle-top juicer from Umbra. Simply place the juicer into the top of your beverage container and quickly juice a lemon or lime right into your drink. Works with most standard water, sparkling water, juice, soda and beer bottles.

Buy one on Amazon