How do you say can I have a bottle of water in Chinese?

There are a few ways to say "Can I have a bottle of water?" in Chinese, depending on the formality and context:

Formal:

* 请问，我可以要一瓶水吗？ (Qǐngwèn, wǒ kěyǐ yào yī píng shuǐ ma?) - This is the most polite way to ask, and it literally translates to "Excuse me, can I have a bottle of water?"

* 麻烦您给我一瓶水好吗？ (Máfan nín gěi wǒ yī píng shuǐ hǎo ma?) - This is a more direct way to ask for water, but still polite. It means "Would you mind giving me a bottle of water?"

Informal:

* 给我一瓶水。 (Gěi wǒ yī píng shuǐ.) - This is a direct and casual way to ask, and it means "Give me a bottle of water."

* 我要一瓶水。 (Wǒ yào yī píng shuǐ.) - This is also informal and translates to "I want a bottle of water."

You can also add "请" (qǐng) at the end of any of these phrases to make it more polite. For example:

* 给我一瓶水，请。 (Gěi wǒ yī píng shuǐ, qǐng.)

Additionally, if you're asking for a specific type of water, you can specify it after "水" (shuǐ). For example:

* 请问，我可以要一瓶矿泉水吗？ (Qǐngwèn, wǒ kěyǐ yào yī píng kuàngquánshuǐ ma?) - "Excuse me, can I have a bottle of mineral water?"

* 我要一瓶冰水。 (Wǒ yào yī píng bīngshuǐ.) - "I want a bottle of ice water."

Remember to adjust your tone and body language to match the formality of the situation!