 So what's happening you have the filter inside but then remember we ourselves said that when this filter is inside It smells so then you realize that you know, oh, this is not going to work These got a lot of value. So let us further develop this and take it forward So then the student said why should it be around why can't I use a square because I'm able to take more volume You need a 2 liter capacity volume and then she built a mock-up model You saw what a ring was a ring was a working model a mock-up model is physically resembles the Shape but does not have any functional aspect So she developed this with the tube with everything and now she moved the filter outside See but the technique of rotating is still there Which is why the product was selected and then that is Devanshi in the picture So what should you do? You must do an inaction of your mock-up So it's like a theater you go with this thermocol as if you're going to fill water You go to a pond you sit over there take this bottle from your bag Do the complete operation as if you're filling water and then Drink also from it and she's not getting anything out of it and then experience the whole thing So you start getting problems and you can start solving those problems But she said the the cranking was very easy the bottle holding was very easy because square a lot of other Advantages you could find out now. We learned our lesson. He said who are we to decide if the bottle is good or not? Who should decide the end users So we again sort of went to CRPF and we showed them the thermocol from my earlier experience I knew that we must not show thermocol to end users, but now these end users were part and parcel of our design process But here in this case we we changed our own strategy and we took a thermocol mock-up to them And said imagine that this could be a bottle and we you know discuss with them and you can see This is the water filter Water to suck or to get into the bottle a pump is on this side So we will get this pump manually in the water bottle So I have a doubt regarding the shape of the bottle It is already in the form of a bottle on the upper side At that time if you keep it on the body it will have to be delayed or it will have to be damaged So sir if you keep it on the top side of the cap It will have to be filtered And it will have to be damaged So in the lower cap you can get a different attachment And you can use the tube that is hanging on it So that it is not seen in the water bottle And regarding the pump it should be like this So how do we get this pump in the water? From where we are getting water from the pond or from the drain So do we have to put the filter in the water? Yes we have to put it in the water So we have to put the filter in the water So we have to put the filter in the water And if the cap is open then you can see how much water is in the bottle And regarding the shape Vertical shape, minimum 2 liter capacity And our uniform has a normal color Soundproof And this is another problem So after some time the water comes into the water So after 3-4 hours the water comes into the water So we got very valuable feedback again They said the shape itself is not convenient for us to carry See what happens, designers like to try new things We knew this from Devan that it is going to go on the side of the bag But she also found that when the square bottle can hold more water So what do we trade off? Holding more water or carrying the bag So my end user is clearly telling me Trade off the large volume to carrying ease So it had to be made round again They had again suggestions of where the cranking should be Because the cranking is done when you are filling water So that should be in a location which is more easy Along the length of the bottle rather than being on the side So all these suggestions were taken And while the student was in her third stage of presentation She made these multiple mock-ups again