The one cheap change that most improves a home bar is to squeeze your own citrus. A bottle of lime juice from the shelf tastes flat and a little bitter next to fresh. Fresh juice costs a few cents a drink, and it is the difference between a drink that tastes like a cocktail and one that tastes like a mix.

It also changes what you should buy first. Before the fancy bottles and the matching glassware, the list is short: something to measure, something to shake or stir in, something to strain with, ice, and something to juice with. This piece covers why the juice matters, how much to squeeze for a night, and what to look for in a squeezer.

Why fresh juice is the upgrade

Sours (a spirit, citrus and sugar) are the backbone of the classic repertoire: the Daiquiri, the Margarita, the Whiskey Sour, the Gimlet. In all of them citrus is a third or more of the liquid, so its flavour is the drink. Bottled juice is made to sit on a shelf for a long time, and the bright, aromatic top notes are the first thing to go.

The oils in the peel matter too. Squeezing a lime releases a little of that oil into the juice, and it is part of why a fresh Daiquiri smells of lime before you taste it.

Fresh does not mean squeezed one second ago. Juice is best a few hours after squeezing, and clearly past its best by the next day.

That is the timing most bar writers give. Lime juice tastes sharpest, almost raw, straight from the fruit, then rounds out over several hours and fades by the following day. So squeeze in the afternoon for the evening, keep it covered in the fridge, and don't plan on using it three days later.

How much citrus do you actually need?

A typical lime gives roughly 25 to 30 ml of juice (about an ounce), and a lemon a little more. It varies with the fruit: firm, cold limes give less, room-temperature soft ones give more. Common specs use 20 to 30 ml of juice per drink, so one lime covers about one drink, with a little spare for mistakes and garnish. The tool below does the sums for the drinks you pick.

The first-purchase list, in order

If you are starting from nothing, buy in this order, and stop wherever the drinks you actually make stop needing more.

• A jigger or small measuring cup. Balance is everything in a sour; a 5 ml error in the lime is obvious. Pick one marked in both ml and oz.
• A shaker with a built-in strainer, or a two-piece shaker and a hand strainer. A clean screw-top jar works on night one.
• A citrus squeezer. Everything above is wasted if squeezing is a chore you skip.
• A long spoon and a mixing glass (or a big pint glass) for stirred drinks such as the Negroni and Old Fashioned.
• Good ice. Plenty of cold, dry cubes from a tray with a lid. Ice does as much as any bottle.

Drink responsibly: measuring is also how you know what is in the glass. And every drink above has an alcohol-free version; the Virgin Mojito is in the tool for that reason.

Variations: no-alcohol and low-effort

Most sours work without alcohol. Replace the spirit with chilled tea, a non-alcoholic spirit or sparkling water, keep the citrus and sugar, and taste before serving. The lime does the same job, so squeezing is still the first step.

What to look for in a squeezer

Whatever the budget, four things matter:

• A cone and strainer that match the fruit. Limes are small, so a smaller cone works better than a big orange reamer. Check it handles both limes and lemons.
• A spout and a seed strainer so you can pour straight into a jug or jigger without pips or too much pulp.
• Parts that come apart for washing. Citrus residue in the cone gets sticky, and dishwasher-safe parts are worth having.
• Enough bulk for your habit. If you make two drinks at a time, a hand squeezer is plenty; for a round of six, an electric press saves your wrist.

Below are three squeezers at clearly different budgets, roughly €25 to €140. They are examples to compare, not reviews; the links are affiliate links, and the page shows current prices from the shops.