I had a few young Dionaea in standard 7x7cm pots. I decided to pot them up in larger pots without taking up too much more space so once again I opted for long toms. These are the shorter ones of my two options being 7x7x14 cms - 0.5 litres and are perfectly adequate for my requirements.
Here's the comparison with a standard 7x7cm pot
We'll see how the plants progress.
The longer version is 7x7x18cm and there is an 8x8x20cm version available too