Chosen Solution
You’ll need a step down transformer that has the needed wattage for the popper. You might find getting a UK 220volt popper cheaper than the transformer, unless you have other US devices that could use it.
@grassfed you do not use it without using a Step-down transformer. If you plug it in without, it will pretty much destroy the electronics. Something like this will work. Of course there are many many more of those. Just watch the Wattage.