Infinity bottles are fun! I use the decanter from our wedding registry to keep mine.
I have to admit that I have never heard the term "infinity bottle" before.
But despite that fancy name, I did buy the bottle below when they came out in 1995, drank it down for a year or two to almost the end, and then have been adding the last little bit of many, many bottles of Scotch whisky to it over the years. And subtracting along the way, naturally.
(BTW, for those who cook, we do the same thing with spices and dried herbs: one canister for herbs only, and one for spices. They're our house blends, constantly evolving, and we probably use them in half the dishes we make.)
For those keeping score: Aberfeldy, Aberlour, Allt a 'Bhainne, Ardbeg, Auchentoshan, Auchroisk, Aultmore, Balblair, Balmenach, Balvenie, Banff, Ben Nevis, Benriach, Benrinnes, Benromach, Blair Athol, Bowmore, (Royal) Brackla, Braeval, Brechin, Bunnahabhain, Caol Ila, Caperdonich, Clynelish, Convalmore, Cragganmore, Craigduff, Craigellechie, Dailuaine, Dallas Dhu, Dalmore, Dalwhinnie, Deanston, Dufftown, Fettercairn, Glen Albyn, Glenallachie, Glenburgie, Glencadam, Glen Craig, Glen Elgin, Glen Esk, Glenfarcles, Glenfiddich, Glengarioch, Glenglassaugh, Glen Grant, Glengoyne, Glenisla, Glen Keith, Glenkinchie, The Glenlivet, Glenlochy, Glenlossie, Glen Mhor, Glen Moray, Glenrothes, Glen Scotia, Glen Spey, Glentauchers, Glenturret, Glenugie, Glenury Royal, Highland Park, Imperial, Inchgower, Inchmurrin, Inverleven, Isle of Jura, Kinclaith, Knockando, Ladyburn, Lagavulin, Laphroaig, Ledaig, Linkwood, Littlemill, Longmorn, Macallan, Macduff, Mannochmore, Miltonduff, Mortloch, Mosstowie, Ord, Pittyvaich, Pulteney, Rhosdhu, Scapa, Speyburn, Springbank, Strathisla, Strathmill, Tamdhu, Tamnavulin, Teaninich, Tomatin, Tomintoul, Tormore and Tullibardine.
Plus who knows how many others since then...