I love this case as I have been on the hunt for a lighter weight (but still protective) case that will hold my trumpet, iPad Pro, iPad holder plus a mute and accessories (all the mouthpieces!). This case holds that and more! The description is a bit vague in terms of mute storage but I’m pretty certain with a bit of moving around you can fit a cup, straight and Harmon easily with a trumpet inside. The only warning I would give is that this rucksack case is absolutely massive with the base being roughly the same as a Bonna Quad- that being said it’s much lighter, features metal screw clasps on the straps and is far less bulky than a quad! Highly recommend!