I love the internet.
Turns out Wintergreen Lifesavers (any maybe other flavors too, I just heard about Wintergreen) activate the carbonation in soda. If you drop one in a cup of coke and wait for it to stop fizzing (10 or 20 seconds) the soda will be flat.
The better experiment was to dump a bunch of lifesavers into a bottle of Coke (Rite-Aid Diet Cola to be exact in this case). We got one of those wide mouth 3-litre bottles (party size) and a bag of giant Wintergreen Lifesavers. Check the video to see the result...
(right click me, save target as)
Background info: the bottle was room temperature and opened right before the video starts. I'm told that the Lifesavers in a regular roll are smaller and will fit into the mouth of a 2-litre. I would probably go higher since the opening is smaller.
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