Whatever you do, don't pour coffee from your Nikon lens thermos into the Canon lens mug. You know those lenses aren't compatible without an adapter. Just $24, a few notes less than the Canon lens thermos. [PhotoJoJo via RedFerret]
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I just ordered it! It's a pity I don't actually own that lens though. I still want the 70-200mm f/2.8 thermos. Why don't they make enough for everybody?