To find the weight of the bottle alone, we need to subtract the weight of the quarters from the total weight of the bottle and coins. Let's convert the weight of the quarters from pounds to grams first:
0.885 lb * 453.6 g/lb = 400.14 g
Now, we can subtract this weight from the total weight:
2015 g - 400.14 g = 1614.86 g
So, the weight of the bottle alone is 1614.86 grams, which is equivalent to 1.61486 kilograms.