@Karl
One dose can be as small as a sip of water.
The frequency of dosing is suggested to be spread throughout the day and not only all in the morning.
Example some serums which work on digestive system, the digestive system works 24 hrs. And if one takes energy only in morning, how will that be justified ?
If Key Pen Serum is for sugar metabolism. If one consumes at least 3 meals spread through the day, and takes energies only in the afternoon, what will happen.
Don’t carry multiple bottles, Fill glasses and keep.
You can complete some dosing while at home in evening.
Or you can use other methods which don’t require water like direct request.
One has to design healing as per convenience and need.