Hosting without the waste

Batching cuts waste in several directions at once: less spillage, fewer part-used bottles, and far less of the last-minute over-buying that comes from not knowing how much you need. It also means guests are not each opening a fresh mixer.

Not everything batches. Stirred and built drinks hold well; anything shaken with fresh citrus is best mixed ahead but finished to order, since citrus dulls within hours. Anything carbonated must be topped at the last moment.

The site's party calculator will do the arithmetic on quantities, which is more reliable than the traditional method of buying twice what you think and hoping.

The largest single source of party waste is abandoned drinks. People put a glass down, lose it, and pour another. Glass charms, chalk pens, or simply having noticeably distinct glasses reduce this more than any other intervention.

Real glassware beats disposables comfortably on impact if you own it already and are washing a full load. Where disposables are genuinely necessary, one type used consistently is easier to sort than a mix of three.

Ice is usually the item most over-bought and the one most likely to be thrown away, since it cannot be returned to the freezer once melted. Work out the quantity from the number of drinks rather than the number of guests, and keep it in a cool box rather than spread across the freezer.

For everything else, buy toward the middle of your estimate rather than the top, and choose formats you will use afterwards. A mixer you like drinking is not waste if there is some left; a novelty liqueur bought for one punch is.

One more: offer a genuinely good alcohol-free option rather than a token one. Drinks that people actually want get drunk, and drinks nobody wants get abandoned half-finished — which is the waste this whole page is about.