Caviar has a reputation for being intimidating, but the rules are simpler than they look — get them wrong, though, and you can spoil a very expensive tin. A recent expert roundup pulls together advice from chefs, bartenders and hotel F&B pros on buying well and serving better, and it's genuinely useful if you're planning a fancy night in or wondering what to order.

First, the basics: true caviar is sturgeon roe, and it comes in three main styles. Beluga is the rarest, with large eggs and a delicate, creamy flavour. Osietra has medium-sized eggs with a rich, briny hit. Sevruga is the budget-friendly option — smaller eggs, bolder taste. Salmon and trout roe often stand in as cheaper alternatives, but as Reid Lauber, senior food and beverage manager at the Lotte New York Palace, points out, price isn't everything: quality, freshness and personal taste matter more than the label.

Provenance is worth a glance too. China, Russia and Italy have long dominated production, but new players are emerging — Exmoor Caviar is the UK's only producer and supplies Michelin-starred restaurants across the country. Farmed caviar, once sniffed at, is now the standard given overfishing of wild sturgeon. Big names to know include Paris's Petrossian (in business since 1920), Umai with its caviar concierge service, N25, and Fortnum & Mason's tasting set if you want to compare styles side by side.

Serving is where most people slip up. Caviar must be ice-cold — rest the tin over ice if you can. Use a crystal bowl or coated metal to avoid any taste transfer, and reach for mother-of-pearl spoons: they don't oxidise on contact with salt and they're soft enough not to pop the fragile eggs. Metal spoons straight from the drawer are the classic rookie error.

On pairings, the experts lean simple. Good bread, salted butter and a generous spoonful is the purist's move. But there's a fun counter-trend of pairing caviar with low-brow snacks: James Stevenson of London cocktail bar Brutes of Mayfair swears by a sour cream Pringle with crème fraîche and chives — 'basically the perfect canapé' — while the New York restaurant Coqodaq piles it onto a golden chicken nugget. London's Trivet even serves it with yoghurt gelato. For drinks, try the martini-and-caviar 'bump' at Brutes of Mayfair: the cold, clean martini cuts through the saline richness and resets your palate for the next bite.

Why should a traveller care? Because this is the kind of knowledge that upgrades a trip — ordering Osietra with confidence at a hotel bar, bringing back a tin from Petrossian, or recreating the Pringle canapé at a dinner party and looking like you planned it all along.