They'll fill any growler, doesn't need to be Tröegs branded.
They are refillable but I believe you need to bring it back already rinsed/cleaned.
Free
I brought my own to be filled, just make sure both caps are sealed. Mine has a filling cap with a pouring cap built-in.
They'll refill it. Most breweries will fill any growler, pretty sure Troegs does. Some brewers only fill their own branded growlers...bad policy.
You can bring it back for a refill.
They'll fill it, no need to buy a new one unless you're leaving with lots of beer!
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