Most recipes that use significant amounts of liquid call for quantities between 1/2 cup and 4 cups, with larger soups, punches, and stock recipes moving into the 6- to 12-cup range. Here's how common liter-labeled containers map to those recipe requirements. Read this table from left to right when you know the recipe amount first, or from right to left when you are standing in the store deciding which bottle or carton is the smallest one that will work.
A few practical examples show how this table works in real cooking situations. If you are making a large pot of soup that calls for 6 cups of broth, a standard 1.5-liter carton of broth holds 6.34 cups. That is exactly enough, with a small amount left over for tasting or adjusting seasoning. For a smoothie recipe calling for 1 cup of almond milk, any bottle 0.33L or larger works, including the smallest shelf-stable cartons. A 1-liter carton gives you enough for 4 smoothies.
A bread recipe calling for 1 1/2 cups of warm water needs only 0.36L, so a standard 0.5-liter bottle holds more than enough, with about 1/2 cup left over. A punch recipe for a party calling for 8 cups of juice lines up almost exactly with a standard 1.89-liter half-gallon carton, while a 2-liter bottle gives you a small buffer. The decision is less about memorizing every conversion and more about recognizing which common package size clears the recipe requirement.
When a recipe is flexible, choose the bottle with a visible buffer rather than the exact mathematical minimum. Soups, smoothies, sauces, and punch can usually absorb a few extra tablespoons, while bread dough, gelatin, syrups, and custards are less forgiving. If the table says a 0.5L bottle just barely covers 2 cups, treat it as enough only when the bottle is unopened and you can pour carefully. If the container has already been opened, move up one size or measure what remains before committing the recipe.