Instead of placing a pitcher of water or a bottle of San Pellegrino on the table - try reusing a great looking wine bottle to hold your water. Every so often, I find old wine bottles at resale shops and I can't resist buying them. The older, Italian wine bottles have a lovely shape. I clean them thoroughly with a bottle brush and fill them with chilled tap water. Save a nice cork from a bottle of wine and you've got the whole package. Also - you can add a clipping of mint or a squeeze of lemon to give your H2O subtle flavor.
If anyone is thinking this is homemade vodka - they'll be seriously disappointed - I believe in labeling things for guests. I made this tag with rubber stamps and hang tags from Office Depot.
Keep a few bottles in the fridge.