I have tried all of the above, and a metal bucket works best with my pack (pitbull, dogo/american bulldog puppy, and a doberman pinscher) all rescue dogs = issues, my pitbull has a fixation on eating dog poop, so I am out there two or three times a day religiously picking it up before she gets to it.
Being from Texas, I undersand about the hot weather. I have found a simple metal 10lb bucket with metal lid, works perfect, I keep it outside right by the pooper scooper, I double up two scented small kitchen bags in it, and I toss the poop in there as I pick it up and then tie it up and throw the bag out with the garbage pick up weekly.http://www.thegreathardwarestore.com/Behrens-10Gallon-Steel-Garbage-Pail-6110-p/409227.htm
The perks to this bucket is:
- it is metal which makes it impermiable to smells when the lid is on
- it's heavy enough to not fly away, sturdy enough to not be detroyed by a chewing dog, even the puppy hasn't been able to get into it
best of luck