Hmm. So they've had swimwear before? Haibara wasn't here for that. But she supposes that a number of places they could potentially visit would have water of some sort, so it makes sense.

"Maybe if we all suggest the train to get a pool, we can have access to swimwear on a longer basis." She wouldn't mind having another activity to keep herself from being bored, even if she wasn't much of a swimmer. Still, that was hugely hypothetical.