single use eye drops

I’ve always been curious about how those single use eye drops are made.
Is is blow moulded, if so how they get the liquid in and seal it?
see attached pic.

It looks as if they are blow molded and heat sealed at the end.

it is blow molded with a long neck that is hollow, after filling a heated die re melts the neck into the tab/connector…really now this should be obvious.

Thanks zippy. That was a bit more detail than I added. I agree pretty obvious.