"Our milk is available in reusable glass bottles. You can really help us out by rinsing them well before returning them - we will require less water for sanitation and can reuse them more often. Glass bottles have so many advantages - we don't even know where to start. First of all, they're reusable. On average our bottles have a return rate of 80% and get reused 6-8 times, so that's definitely good for the environment. But glass bottles also keep your milk colder in the fridge and therefore it lasts longer"
Reference:
http://strausfamilycreamery.com