I've thought about the Grayl Ultralight, which weighs 10.9 Oz and requires a flat surface to push on.

Katadyn BeFree weighs 2.3 oz and also fits the threading for HydraPak Seeker 1L, 2L, 3L
https://www.rei.com/product/100537/k...and-filter-set
No filter for taste (vs the Ultralight), filters for Protozoa and Bacteria. It is high flow compared to the Sawyer Mini.

I usually don't need to overlap safe water filter with good tasting filter but can see how some would. 8 oz is approximately a sweater, thermos, kindle, or backup battery. I can do a lot with that weight, especially if I'm toting it about in my day bag. I'd rather process the water in room and put it in a lightweight bottle when going out. The water itself- 16 oz is ~ 1 lb.