A collection of cup holders that slide between your couch cushions. Free to download https://makerworld.com/en/models/1318086-cup-holders-for-sofa-cushions#profileId-1353638
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They've got a lot of space around the can. If the spacing is correct, could slide one of those double-wall vaccuum soda-can holders in there, keep the drink cold. If it's not, could tweak the diameter.
Yes they can easily be scaled to fit them. I have 73mm and 85mm holders. The smaller one is pretty universal for most store bought bottles and the bigger one is more for cups and glasses.