 So, in the design process you do dichronic and synchronic analysis, you look at all similar products in the market and you also look at all other products which will help you in understanding this. So, here you see a lot of bottles are available in the market. So, what are these specialized bottles which we need to manufacture to understand or design, take all the interesting cues from the existing bottles from their lids, from their materials and check how we can learn. Similarly, we took pictures, we asked our you know Javans to send us pictures from their mobiles and we could look at their operations, see the circle they are carrying an old bislery bottle which is lightweight. But very interestingly they came and told us, so this bottle is dangerous because this old bislery bottle or the old Coca-Cola bottle we carry makes sound and that sound is very dangerous for us. It reveals where we are and we may get shot, it is life and death. It is not that simple, so that was a great insight. We learnt from them and then we decided my god we need to make a bottle which does not make any sound which is very robust and you know which is either good for carrying large amount of water. So, you have to work hard to make the bottle lightweight. So, every context situation is leading to a material selection for my bottle see and then we also looked at all the available international filtration you know mechanisms. You all heard about this life straw very good for trekkers and our CRPF also was inspired and they bought some life straws for themselves. But they found out that it is like not very useful because the type of clogging which happens to them is very high and you spend 2000 to 8000 rupees on this small unit. Again context see the life straw was made for a different purpose. It is not for the critical context of a CRPF javan who is under operation and he is in the field you know with no water heavily thirsty that context is very critical. So, here you can see all the aspects which we analyse and studied. So, the first one is the life straw you can look at what it is made of what type of filtration it is doing 0.2 micron level of sieves. So, you are filtering bacteria and then you have lifetime capacity of how many liters pretty good. As soon as the micron pore size reduces what happens the pressure to pump increases. But as soon as go to 0.02 micron you need to use a pump otherwise it does not work. So, it is not the technology is not around us it is around us. But have we made it into a usable product not yet we can go that route, but remember we have made a mandate for ourselves that within the students project we will take the project forward. So, finally what we did our concern was you know very immediate. So, we chose the aqua guard on the go which is this particular you know the filter bottle and this filter bottle has the nano filtration inside this detail. But we said we would not use this bottle will we will use the filter unit which is very good and with this filter unit we will remove all the problems they were facing. But I am telling you they were inside the water so it is smelling. Now I narrowed down any technology which is already available. So, now our design can leave from because now we have designed a technology. So, what are the other things which we will do? This technology has small pore sizes cheaper and replaceable extremely cost effective easily available in the market. So, now what is the next step we should do? We must see within the context you know will it will it work in the situation.