Treat toy suggestions?

[stardogs]

Ok, it's been a while since I perused treat dispensing toys for the dogs, but I realized I need to replace their Busy Buddy Squirrel Dudes and Waggle toys due to wear and I need some help finding good replacements!

We currently have:
Squirrel Dude (2, with 2 MIA)
Waggle
BB Football
Kibble Nibble
Tricky Treat Ball
Bob A Lot
Kongs (3, with 1 MIA)
Wobbler
Treatstik (MIA, though)
IQBall
Tug A Jug sans rope (using a ball inside instead)

Any suggestions on new ones we should try? Especially valuable would be ones that are durable enough to use unsupervised and that hold 3/4 cup or more of kibble.