It was so hard to find a safe sunscreen in stick form! I finally found it: Benton Mineral Sun Stick Spf 50.
My mother prefers using stick when gardening whole day long - it's easy to reapply the stick when your hands are dirty.
Since its a small size for handbag, I think I will order several sticks for the next summer.
Highly recommended: no harmful filters are included into this formulation!