I am diabetic and use test strips a lot. The strips come in a sturdy white plastic flip top vial just right size to store Lyman G & H (hope this is right nomenclature) bullet sizer parts in. These are airtight and very sturdy, the lids are attached with a strong strap. Inside dimensions ID .630" Depth 1.800". I have a SFRB with 20 of these in it I will send to someone prepaid.