Bike-ade
makes 1 gal.

1/3 t morton salt lite
5/8 t salt
3 t citric acid
1 t calcium carbonate
.9 C. Sugar
2 drops lemon, lime, or orange oil (dip a solid rod into the bottle and let the drops fall off the end.  I use a stainless steel chopstick from William-Sanoma)

Mix the ingredients in a ziplock for later use or add them directly to a gallon of water.

I prefer the taste without the calcium carbonate but fear that the acid will erode my teeth just as lemonade will.  Another buffer might improve the taste.  

Citric acid and calcium carbonate are available at homebrew beer and wine shops.  They usually sell them in 1 or 2 oz. jars for dear prices, but you should be able to negotiate a good price on a pound or two.

Citrus oils are available from Boyajian: http://www.boyajianinc.com/cart/enter.html The $9.00 sampler will last a long time.

A simple variant of this recipe for those who wish to avoid purchasing the special ingredients is to substitute 1 package of unsweetened Kool-aid for the citric acid, calcium carbonate and citrus oil. It’s more expensive and doesn’t taste as good but it’s simple.

3 gal:

1 t morton salt lite .25 oz
2 t salt	.5 oz
3 T citric acid
1 T calcium carbonate
2.7 C. Sugar	20 oz
6 drops lemon, lime, or orange oil (dip a solid rod into the bottle and let the drops fall off the end.  I use a stainless steel chopstick from William-Sanoma)

2 5/8 cups

Base for lemonade

1 t morton salt lite .25 oz
2 t salt	.5 oz
2.7 C. Sugar	20 oz

1 1/2 scoups per water bottle with 2 - 4 T lemon juice.