Hello! ^_^ I would probably say something like that: 虽然我不喝牛奶,我也吃牛奶制成的酸奶。 Although I don't drink milk, I do eat yogurt which is made of milk. To describe a property of "yogurt", we just need to use a 的-proposition. The particle 的 is used to attribute qualities to things. You can use it to replace "that", "which", "who", etc. Let's take a look at another example to see how it works: 这是我吃过最好吃的冰淇淋。 Zhè shì wǒ chīguò zuì hǎochī de bīngqilín “This is the best ice-cream that I've ever eaten.” Hope this helps!

I thought "I don't drink" means "I don't drink alcohol" until I read the comment and the answer. :)

Using 可是 is right, but it sounds weird. I think 但是 is the best.

虽然 我 不 喝 牛奶，可是 我 吃 用 牛奶 做的 酸奶。