On chemo days I have a funny taste in my mouth that just won't go away. One of my favourite ways to combat the taste is to drink homemade lime sodas. Normally you would have to squeeze half a lime or lemon into a glass of club soda, but modern technology has made this previously tedious process easier than pie.
One of the shops at my local market sells a product called True Lemon (there's also True Lime and True Orange for other citrus lovers). This product comes in individual sachets of dehydrated juice (of your citrus of choice), each equivalent to 1/2 a tablespoon of juice. I simply pour a glass of club soda then empty one or two sachets into the glass. Voila! Instant yummy citrus water goodness.