Basic Shampoo

1-1/4 Cups SUPER Concentrate
32 oz distilled water
1/2 Teaspoon Soap Crafters Fragrance
8 drops of Liquid Colorant
Optional: 1.2 ounces Humectant
Use distilled (purified is not distilled) water for best clarity in the end product; tap water will add a cloudiness. Use a stick blender to mix the Super Concentrate with the water then add the colorant and fragrance.
(A stick blender must be used to mix because hand stirring will not mix it in properly.) Mix for about 1 minute.
Allow mixture to sit overnight before bottling to give the air time to escape and the mixture will return clear. If you use non-distilled water, it will be cloudy. If you add oils to the mixture then it will be opaque.
If you add Humectant, it will give an amber tint to it.

I would think it would be
I would think it would be just fine for a couple of years, but probably longer. There really isn't anything in it that would go bad or spoil.
is there an experation date
is there an experation date on shampoo- shower gel or liquid hand soap