Sorry for the delayed response. Thank you so much for your inputs.
Yes we have made an early stage prototype for testing the concept. Will definitely share it in the final phase. Our final design is most suited for PP material. However with some changes in the design it could fit for PET as well.
We have worked on the refilling and other usability aspect. Will update the results and share it in the refinement post. Since we feel it would be more appropriate to explain it thru renders and sketches.
We are in discussion with some blow moulding experts and we have received positive feedback on the manufacturing aspect. A bit more refinement is required before taking it to the manufacturing stage. But it is definitely manufacturable.