[tang daddy]

I buy large packs of mysis about 1/2 inch thick and then break them into 1/4 then defrost them and do as diana suggested which is spread them into thin sheets in ziploc so it's easier to feed and never had any problems. I even once went out and bought frozen food through it in the back of my car seat, this was in the summer and then next day while going out for dinner with my gf, I was like what's that smell .....oops!!
but still I fed them to my fish with no problems.....