This means "sweet ones" where corresponds to a pronoun "one(s)" in English. For example, means "the more expensive one". The sentences mean or "I can drink (at least) sweet ones."
I'm a bit confused what exactly is happening in this situation, but are they really talking specifically about beers? Japanese beers are not fundamentally different from foreign beers. To me, it sounds like this person is saying "I can drink (not-so-hard) sweet alcoholic drinks", such as Cassis orange. Can you double check the context?