There are a couple of important points in these posts. First, there is a reason why the hosts are consecrated in one ciborium, unless you actually need thousands of hosts. The Church prefers that they be in one ciborium as a visual sign of the one body. That’s where that custom comes from and it’s very old. It’s not even in canon law any longer, to the best of my knowledge, because it’s an established custom for a long time.
The other point about the pouring and shaking. First it’s not a sinful act so you need not worry. It’s perfectly practical actually. The idea is not only to get all of the hosts to fit into the one ciborium, but also to shake off as much as you can of the particles that are at the bottom of the ciborium that you’re emptying out. And there is the sanitary reason, to avoid touching the hosts as much as possible. It’s just that in the past, when the mass was ad orientem, we didn’t see what was going on at the atlar, because the priest or deacon were blocking our view. Now we can see it.
It’s not a lack of reverence, it’s just a practical and sanitary reason that the ciborium is shaken. The use of the one ciborium has always been recommended except when you know that you’re going to need more than one, such as at a very large gathering.
But all of it is done with a reason. It’s just not the most graceful moment of the mass. I have to admit. But you don’t want to scoop out the hosts either, because that would be one more article to purify. I’m not even sure if you’re allowed to use a spoon in the Latin Rite. I have never seen it done. I know that they do it in the Eastern Churches, but that’s for communion.
Fraternally,
Br. JR, OSF