eksmith:DS is 6 weeks and takes 3-4 oz. I'm sure he would take more if offered.
Same with my little guy.
DD is 11 weeks. She will ALWAYS eat indefinitely so with a bottle we have to police her pretty carefully. We burp after every ounce and then look for additional hunger cues (licking lips is a big one) before giving her more. Because if offered, she will always take more and spit it up everywhere, and I hate wasting milk like that.
In the morning she normally takes 3-4 ounces and 2-3 in the afternoon / evening.
ShabyKitty:E is 6.5 weeks and drinks anywhere from 34 oz. I found that sometimes he needs a break to burp but then he'll keep drinking.
Same here except Ryker is 8 weeks. Occasionally he will do 5 oz.