I would like to proceed differently. The bottles are pretty standard and all measurements that would be required in the industry are possible as we did confirm.
So the normal procedure is:
1: We confirm that the DSG can measure the containers (Done)
2: We issue a quotation
3: The customer reviews and confirms he could allocate the budget
4: We do some test measurements prior to receiving the PO.
After I did read the emails again I have the feeling that they are just looking for a free measurement.
So let's do the steps 2 and 3 first before doing 4.