My wife asked for a funnel to make filling our Simpletaste one-handed battery powered salt and pepper mills easier to fill. These are designed with a smaller diameter feature that positively locates the funnel in the bore of the grinder openings, and a slightly larger diameter to prevent the funnel from extending too far into the mill. This model does not have the small locking tabs like the covers, but for reloading the mills that feature is not necessary.