Question

To prevent the degradation of sunlight from material and store in which type of bottle.

Answer 1

Materials are stored in dark coloured bottles.

This is so because the materials which are sensitive to light reacts with it and this results in alteration of their properties.

So in order to prevent this , they are stored in dark bottles.

Answer 2

You can store it in dark colour bottle or you can also store it in the bottle in which the sunlight can't go easily.