What do you use to jar your bettas and how do you keep them warm enough?

I am using these 80 oz tubs that work really well, only I have to keep my house warm to ensure the tubs are warm enough...otherwise, room temp water is about 70 and I prefer the water be kept at least at 75.

I'm getting a bunch of beanie boxes from a friend and she uses a reptile coil thingie to keep them warm.

So, I'm just curious what other people do.

I use beanies right now, and as the malesd getlarger, I switch to 1 gallon tanks.
My house is warm enough that I don't worry about heating the tanks, and also, I believe that catering to every tiny thing makes for less hardy fish.. so I am not too worried if my water isn't a constant 80 degrees.
If they have to live in 74 degree water for a couple weeks during the winter because the temps dropped a bit, they will either live or die, and the ones that die weren't worth breeding.. Guess what, they always live.
These fish are stronger than many give them credit for.

yeah bella i feel the same way only the stong survive around here although apparently there hasnt been any weakling lol they all do fine in the cooler temps in the winter months :T

Heck, mine are gonna be raised on the back porch this summer. Evening temps will be around 75 degrees... Warmer in the day...
We will see what happens.

Well, so far, these juvies are just as active as their warm-tank counterparts...but I live in SF, and it's never warm here...never too cold but room temp water is always in the low 70's to high 60's.