The Seforim Blog has an article discussing it.
Rabbi Dovid Cohen who is the
Administrative Rabbinic Coordinator of the CRC of Chicago has a shiur on this topic here. (It's part of a longer series of shiurim on kosher meat.)
There are the Noahide Laws that applied to all of humanity, post-Flood. Pre-Flood, humans weren't allowed to eat animals. Post-Flood, "any animal is fair game, just like the plants you ate until now."
Eventually the Torah would be given at Mount Sinai, and Jews would have further restrictions (in Leviticus) on which animals they could eat.
Rabbeinu Bachya on this verse says as follows
כירק עשב נתתי לכם את כל. ממה שהזכיר נתתי לכם את כל הייתי מתיר כל בשר כדעת האומות, לכך הוצרך לומר כירק עשב, כשם שיש בעשבים חלק מותר שהם טובים ומועילים, וחלק נמנע שהם מזיקים וממיתים, כן יש בבעלי חיים חלק מותר והוא מה שהותר בתורה, וחלק הנמנע והוא מה שאסרה התורה. וזהו הנכון בפשט הכתוב כי לא בא הכתוב ...
Rashi explains the verse to be referring to animals with partially, but not fully, split 'hooves':
WHICH DIVIDETH THE HOOF AND IS NOT CLOVEN FOOTED, such as the camel, the hoof of which is split on top but is attached below
So, according to Rashi, cows, sheep, goats, deer, gazelles etc. have fully cloven hooves, whereas camels have 'hooves' which are ...
An alternative translation, probably clearer is
With regard to any animal that has hooves but they are not split or
does not bring up the cud, it is impure to you.
A horse is an example of such an animal: it has hooves that are not split and it is not kosher.
A cow is an example of an animal with hooves which are split and which is kosher.
Source: Chumash ...
There is no need to wait six hours after drinking from that bottle to eat milk but there would be an issue in drinking from that same bottle during a milk meal.
See dinonline's answer to a very similar question
During the milky meal he should not drink from the bottle, since there
is residue from the meat meal in and on the bottle. After the meal
however he ...