The Biggest Mistakes People Make When Pre-Mixing Cocktails (And How to Avoid Them)

A little prep goes a long way if you do it right

Pre-mixing cocktails for a party is one of the smartest moves you can make as a host. No last-minute measuring, no juggling bottles, no bottleneck at the bar. Just great drinks, ready to pour the moment guests walk in the door.

But there's a catch. Pre-mixing done wrong means flat flavors, off-balance drinks, and a lot of confused faces wondering why the cocktail tastes "off." The good news? Every single mistake is easy to avoid once you know what to look for.

Mistake #1: Adding Carbonated Mixers Too Early in the Wrong Order

Ginger beer, seltzer, sparkling wine, grapefruit soda if you dump these into your batch at the wrong stage and stir aggressively, you'll knock out most of the carbonation before anyone even takes a sip.

The fix is straightforward: always add carbonated ingredients last, and pour them in slowly and gently to preserve as many bubbles as possible. Every Gloria Keg recipe is written this way carbonated items are always listed last for exactly this reason. A Moscow Mule is a great example vodka and lime juice go in first, ginger beer goes in carefully at the end.

Mistake #2: Not Tasting Before You Seal the Keg

You followed the recipe. You measured everything. But you never actually tasted the final product before guests arrived. This is how you end up serving something too sour, too sweet, or just slightly... not right.

The fix: always do a final taste test after mixing and before sealing. Check the balance. Small adjustments a touch more citrus, a splash more syrup make a massive difference. Recipes like the Aperol Spritz have dialled-in proportions, so using Gloria Keg's recipes as your starting point is always a smart move.

Mistake #3: Putting the Wrong Things in the Keg

This one catches people off guard. Thick liquids, seeds, herbs, and drinks with a lot of pulp will clog Gloria's ¼" diameter pickup tube and then nothing pours at all.

The fix: keep it clean and liquid. Love a Mojito? Smash the mint leaves in the glass, not in the keg. Check the Mojito recipe it specifically notes to keep mint out of Gloria and add it directly to the glass instead. Same goes for fruit chunks, herb sprigs, or anything chunky. The flavour still comes through beautifully; the keg just stays unclogged.

Mistake #4: Ignoring the Pressure Before Serving

You've mixed your batch, sealed the keg, and you're ready to go. But if you haven't brought the pressure back to the correct level, the pour is going to be sluggish or unpredictable.

The fix: after mixing and sealing, make sure the tapper is locked or removed while mixing, then bring the pressure back to 5–7 psi before serving. That's the sweet spot for a smooth, consistent pour and to keep your drink carbonated and fresh. If pressure climbs too high especially with a highly carbonated beverage simply pull up on the pressure release valve ring on the lid to bring it back down. The FAQ page covers this in detail if you want to go deeper.

Mistake #5: Expecting the Keg to Keep Drinks Cold on Its Own

Gloria Keg is designed to keep your cocktail carbonated, pressurised, and fresh not to chill it. If you load it up and leave it out at room temperature, don't be surprised if the drinks come out warm.

The fix: chill your ingredients and the keg itself before filling, and place the keg in a cooler, on ice, or in the refrigerator when it's not actively being used. The neoprene sleeve provides some insulation, but pre-chilling is the real key. Drinks are always intended to be poured over ice in the glass.

Mistake #6: Using the Wrong Gas

Only CO2 goes in Gloria no nitrogen, no anything else. For the 7L, you'll use 16g threaded cartridges. One cartridge pressurises and dispenses one full 7L keg. For the Big G 10L, you'll use a 500g canister, which lasts around 30 full kegs.

Keep spares handy. Running out of CO2 mid-party is a very preventable kind of tragedy.

Pre-mixing cocktails is genuinely one of the best things you can do for your party for you and for your guests. Avoid these mistakes and you'll have a drink that's dialled in, delicious, and ready to impress from the very first pour. Go Gloria.