Syma x5c Pontoon

Pontoons for a Syma X5C Quadcopter. I have no Idea if these will actually work. I'm thinking that you should have several shells and very little infill (none, if you can get away with it.). I've dropped my x5c in the water a time or two, and the thing still works. I want to take it to the lake, but I can say from experience that it will sink. hopefully there's enough air volume in these to keep it afloat for a few minutes.