Amazon! I actually saw someone on here that had it and they sent we the link. I love it! It can fit so many.
Anchor Hocking Montana Glass Jar with Fresh Sealed Lid, Brushed Metal, 2.5 Gallon https://www.amazon.com/dp/B000RMTG3S/ref=cm_sw_r_cp_api_i_Y4-.CbV06VK19
I read this 2.5 gallon one works well: Anchor Hocking Montana Glass Jar with Fresh Sealed Lid, Brushed Metal, 2.5 Gallon https://www.amazon.com/dp/B000RMTG3S/ref=cm_sw_r_cp_api_i_9JVGDb11EH2W6
But I haven’t used it myself so I can’t really confirm...
It's this one from Amazon! Anchor Hocking Montana Glass Jar with Fresh Sealed Lid, Brushed Metal, 2.5 Gallon https://www.amazon.com/dp/B000RMTG3S/ref=cm_sw_r_cp_apa_i_qlNXCbS59H48V
Amazon!
Anchor Hocking 77987 2.5 Gallon Montana Jar with Brushed Aluminum Metal Cover, Clear https://www.amazon.ca/dp/B000RMTG3S/ref=cm_sw_r_apan_glt_i_FM1HBD32Q0TRSNBEYEWN
I’d recommend this jar. It’s the same volume as that tank. There’s a lid you can pop on for when you are moving and there are no silicone seams to leak from all the jostling.
Oh, though wait til the price goes down. It’s normally less than $30.
I use 2 of these:
https://www.amazon.com/Anchor-Hocking-Montana-Sealed-Brushed/dp/B000RMTG3S
...on top of a seedling mat. Then transfer to this...
https://www.amazon.com/Gallon-Bottling-Bucket-Spigot-Beer/dp/B000E62H8I
..to bottle the 2F. I brew 5 gallons at a time. That's 36 500ml bottles. Lasts me around 4 to 6 weeks.
I like those "big mouth bubblers" in the other post. But I generally avoid plastic for the ferments because of the acid.
I'm using one of these: https://www.target.com/p/heritage-hill-glass-jar-2-gal/-/A-10620266
I found mine on Craigslist, I have several now, got them for around $5 each.
They're like the default jar for /r/Jarrariums.
Another good option is this one: https://www.amazon.com/Anchor-Hocking-Montana-Airtight-Brushed/dp/B000RMTG3S
Haven't seen one in the wild, so to speak, but there are people who have put LED light rings in the lid.
I like the first one, you can go lidless or stick on little silicone bumpers (like you'd use to keep from damaging furniture) to put some airspace between the lid and the rim. The second one has a lid that actually seals, which may or may not be a good thing.
Here's a really old pic of my jar: http://i.imgur.com/QACDGRa.jpg The Java moss has migrated and the Cabomba's been re-homed to my Betta tank. It's also completely stuffed with shrimp now.
In mine I run an airstone for water movement and use a 40-Watt-equivalent LED bulb in a desk lamp. There's also a heater because my living room gets into the low 60's during the winter and I want my shrimps to be happy.
If you live in Oregon I'll give you a free jar >.>
https://www.amazon.com/Anchor-Hocking-2-5-Gallon-Montana-Brushed/dp/B000RMTG3S/
Target and Walmart have cheap offerings as well.
Cube:
https://www.amazon.com/Deep-Blue-Professional-ADB11441-Aquarium/dp/B00BUFTE5Q/
The 2.5 gallon Anchor Hocking jar seems to be very popular. I've seen lots of really great setups using it. I don't have one but I did check one out in a brick-and-mortar store. It's really heavy weight and big enough that you can have a lot of flexibility. A little bit of substrate isn't going to crack this sucker!
I've been looking at http://cysexcel.com/ which has some really interesting shapes and sizes. I think they mostly do wholesale so most things don't come in single units. Even when you adjust to a unit price, some of these are really pricey but if you see something unique, you can hunt goodwill/garage sales (which some people enjoy) or you can just pay the price for the size/shape you want.
Couple of examples:
Edit: formatting