What’s your favorite bag you’ve owned and why?

I currently have a Squatch Link that I got as a gift. I love everything about it except that the damned thing won’t stay upright.

If I don’t plant it perfectly it’s always tipping forward or backward and usually spilling discs in the process. Super annoying and I wouldn’t buy one again unless they create a version with a hard bottom. It’s frustrating since it’s otherwise perfect for my needs.

I’m considering other bags (or just fabricating a rigid insert for my Squatch) and want to know your favorite bag and why you like it. Is there anything you’d improve about your favorite bag?