Oxbow Brewing Company - Newcastle Maine
Oxbow is one of my favorite breweries and if you want to enjoy their beer at home you have to visit their brewery between 2:00 and 6:00 on a Friday afternoon / evening. This is the only time the brewery is open for growler fills. I do not recall the cost for growlers but I believe it is $15 for a new growler and $12 for a refill. Whatever the cost is this is money well spent as every beer from Oxbow is top notch and unlike anything else you will get in Maine. They also distribute kegs to bars and restaurants in Maine and Washington DC so keep an eye out for their clear tap handles and if Oxbow is on tap give it a try.Tim & Geoff are great and you will enjoy the time you spend at Oxbow checking out the artwork and brewery. I believe sales are cash only so make sure you plan ahead.
Rising Tide Brewing Company - Portland Maine
Rising Tide only recently started selling growlers after moving their brewery to Fox Street in Portland. They have installed a tasting room and will be filling growlers from 4-7 on Tuesdays and Thursdays / 12-3 on Fridays and Saturdays with tours at 1:00 on most Fridays and Saturdays. Nathan and Heather have an excellent brewery and are great people, again you will enjoy your time at the brewery and certainly will enjoy the beer.
Cost was around $17 for the first full growler and I believe it was $11 for refills. Cash is preferred however they will run a credit or debit card if needed. I will be down there on Tuesday and will update this post with the accurate cost then.