I just bought a case specifically for mineral makeup to use for everyday and for travel. Love it because my jars are always packed now and ready to go. Just pack my brush roll (I put wands, tubes & tweezers in empty pockets in the brush roll). They have lots of travel hints on the case's website. I agree with Debi except I removed the sifter lids and taped up all but one hole (with a bit blue painters tape) permanently. If some minerals are needed up into the sifter, turning the jar upside down shaking it does the trick. Using it right out of the sifter top instead of the lid helps because I was making messes all the time when I transferred the minerals to the lid and back for swirling and tapping. Donner's suggestion of inserting a cotton ball between the sifter and lid is also a good one but I'd rather just put a dot of blue tape on the one hole and not waste anything on the cotton ball.

Now when I buy new colors I just poke one hole in the seal and leave it in place. Hope this helps.