I would agree with other posters - just put the pucks on a dry surface (away from children's reach, or animal's reach).

Don't put them in a closed container - I'm pretty sure that once they are wet, they will continue to react with the water and gasses may build up in a close container and possible lead to the container rupturing.

I also think you are about right on the CYA level's for your pool size. I'm back on tabs this year - 2 months so far and no problems. CYA is still in a reasonable range. I usually have to pump enough water out over the winter months that I'm changing out about 1/2 of my water every year. The tabs in my online feeder do a fine job for me

Good luck