Hello Cassandra,
Last year was my first season rooting dormant fig cuttings. But I certainly learned alot from the folks here. I also learned alot by trial & error - with alot going on in the 'error' department :-} ! I now know MANY ways to NOT root ctgs - (thank you Mr Eddison).
By season's end last time I had really taken a liking to using sphagnum moss. This is also what I am using from the start this season.
Would you mind if I point out a couple of small details that would have me worrind in using those containers in the way you are? My first thought is that they could begin to dry out with the tips exposed to the air that way. My after thought is - maybe not since they are moist on the root end. Just something to consider.
The other thing to consider is, if the ctgs start to put on any buds before they have enough roots, you could break off the valuable buds when trying to remove them from those containers.
It would be interesting to see your experiment through as it is, but we also hate to see people's cuttings fail. So, it's really up to you if you wish to change anything.
I did use some pastic containers, much like yours, last season. But I also used containers large enough for the ctgs to fit in completely. Yet I still ended up primarily using large zipper bags - 1 to 2 gal size.
I eventually settled on finding a way to clearly mark each ctg individually as well. This way I could put multiple varieties in one bag without concern of mixing them up.
At start of this season I went to Wally-World & got some of those paint based markers found in the crafts dept. They're called Painters & I've found the 'fine point' ones to be the most useful when marking small pieces of sticks like this. They work very well, seem to be water resistant at the very least, and the paint dries faster than nail polish. So, overall, they seem to be ideal for our use.
I may not have found these great little 'painters' if it weren't for the suggestion from Jason - Thanks dude!
May your cuttings grow into delicious fig trees Cassandra!