I use a point protector on the end of my dpn to indicate the beginning of a round. These are small and ro not get in the way or weigh down my needle. I really get a lot of use out of them.
They slide off and if you don't JAM them on, you might lose some stitches. I think I prefer the singular point protectors. But since I have these, I'll keep using them, with caution.
I recently purchased the Clover Small Point Protectors. I was pleasantly surprised by the lime green color (versus the teal that I saw) that I received. They are "gummy" which helps them to stay on. This also makes them a little hard to get off, but insures they won't fall off in the bag.
I like the small and the large point protectors from Clover. I would recommend them and also purchase more in the future.