What is the concern of rinsing? That the water I am rinsing it with will have something bad, or that something in the air will get into the bottle and wont be killed? If its the air issue, then are you saying you use meta to clean, then while the bottle is still wet with the meta solution you bottle your wine?
Also how long should the meta be in contact with whatever I am sanitizing? I imagine a few seconds would be enough to do its job right? I ask because sometimes instead of making 6 gallons worth of meta, I only make a smaller amount (saves time and money) and splash the water around for minute or so in the carboy.
taken from the web
http://www.eckraus.com/wine-making-sodium-bisulfite/
Sanitizing Equipment With Sodium Bisulfite
Sodium Bisulfite is also useful in stronger doses with water for sanitizing your equipment. The recommended dose is 1 teaspoon of Sodium Bisulfite per gallon of water.
It is also recommended that either Citric Acid, Tartaric Acid or Acid Blend be added to the solution at the rate of 1/2 teaspoon per gallon. This is not necessary, but if used these acids will increase the potency of the Sodium Bisulfite solution by causing the sulfur gases to release more rapidly.
When using this solution to sanitize items such as fermentation vessels or wine bottles it is not necessary to fill the container completely full. This is because the fumes off of the solution are what do the sterilizing.
For example, only 1 or 2 inches of the solution is required in the bottom of each wine bottle. And, in a typical 5 gallon glass carboy 3 or 4 inches is sufficient.
If you have other pieces of home wine making equipment to sanitize such as stirring spoons or siphoning hoses, you can throw them into a wine fermenter that is being sanitized and seal it up with the lid for 20 minutes or better.
When sanitizing wine bottles just put one or two inches in each bottle right before bottling and let stand for 20 minutes. When you are ready to fill the bottles with your wine, just dump the solution out and let drain for a minute or two--rinsing is not required.
You can safely store any remaining sulfite solution in an air-tight container for several weeks between uses. However, this is not recommended if an acid has been added to the solution as described earlier. This is because the acid will cause the solution to loose its potency at a very rapid pace.