Preserve smoothie?

Hello everyone,

I'd like to drink a smoothie every day. The problem is, I only want a small one, like a 1/2 quart smoothie. But that would mean I'd have to use a blender or Thermomix or something similar every morning, and I'd always have to throw away whatever sticks.

Therefore, I would like to prepare a large smoothie once a week and then fill it into 7 small bottles, which I then preserve accordingly.

As I understand it, there are four possible approaches:

– Heat, rather impractical because of vitamins.

– Acid is already in there anyway.

– Reduce oxygen, how? With nitrogen?

– Preservatives, I would be happy with them if necessary, I just have no idea which ones and how much.

Does anyone have experience with this? Perhaps there's a food technologist among you?

thanks in advance

Regards, Nico Biesinger