You can unhook the handle, pull it through your purse strap, then reconnect it. No need to buy anything extra, but I seen people post about using a Carabiner clip.
There is a popcorn stand near the Imagination pavilion in Epcot that has 3 flavors of popcorn: Buffalo blue cheese, sour cream & chive and cheddar. You can get a mixture of all 3 flavors, or just 1 or 2.
You can get maple flavored popcorn in Epcot near the Canadian pavilion. Maple flavor is also available in the Magic Kingdom's Frontier Land across from the Country Bears on the waterfront.
Everywhere else has regular butter and salt flavor. If you go for a refill at a stand that doesn't pop it right there, you will get it in a cardboard box as opposed to them filling your bucket. It wasn't as fresh, but it made sharing between two people easier by pouring some into the bucket.
Back in our resort room, I used dish soap to wash the bucket in between uses. I also had gallon size Ziplock bags and emptied the bucket into them a few times so I could get more popcorn in the park.
Best advice I have is to get one early in your trip because you will want to use it often.