Yes. Actually, I thought I'd use something a bit more airtight than a bucket, and place it above the actor, but out of sight of course, and have the feed tube running down to the beaker. I'd disguise it by running it though his shirt sleeve. The CO2 fog will flow downwards and emerge in the beaker with some swirling movement, which will enhance the effect of chemical activity. If I had a retort, I'd use that. But I only have a collection of lab glass that I've accumulated by donation.