Has anyone used the Playtex Drop in bottles? The new ones? Can you use them without the liners? I…

Has anyone used the Playtex Drop in bottles? The new ones? Can you use them without the liners? I like the idea, but it would be nice to be able to still use them if we run out of linners. I know the old ones (2nd picture) don't have bottoms but do the new ones have bottoms? ( 1st picture)

Thanks! 🤗