Hello! We tried out the collection of beebread with the use of a normal straw, cut in the midle. As you can see it is easy to collect form 1 cell, but then each one you add it gets more difficult. we think that up to 5 cells is ok and the weight of this bee bread is between 0.3 and 0.45 g.
Therefore, 3 straws can be used to sample 5 cells each, even 6, from each colony.