bottle  conc
    1    1.4357
    1    1.4348
    1    1.4336
    1    1.4309
    2    1.4244
    2    1.4232
    2    1.4213
    2    1.4256
    3    1.4153
    3    1.4137
    3    1.4176
    3    1.4164
    4    1.4331
    4    1.4325
    4    1.4312
    4    1.4297
    5    1.4252
    5    1.4261
    5    1.4293
    5    1.4272
    6    1.4179
    6    1.4217
    6    1.4191
    6    1.4204