Other size bottles?

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So I am currently residing in New Zealand and of course didn't bring any 2L bottles with me on my trip. They only happen to sell 1.25L, 1.5L, and 2.25L bottles. Does anyone know how I could adjust the measurements for the recipes or if the smaller bottles would affect timing? Thanks.

Generally, the smaller bottle the less fermentation time. 2.25 is so close to 2L I wouldn't even worry about it.