I have kept lemon peel in vodka before. At the end of it the peel wasn't good for much, but I had a useable lemon extract. I don't think that I would want to add citrus to a Rumtopf myself, but again, why not give it a try?freemotion said:Vodka and orange juice is a screwdriver, and vodka and lemon is a vodka collins, but I don't know if citrus would be ok in those. Waddaya think of adding a layer of lemon slices?