Yes, got the Caitec tumbler. Penny is afraid of it too. have some pumpkin seeds & sometimes an almond sticking out.
They were gone she may have got them or they fell out. Sort of a bit wonky..its turns but not great.
Was under $3 so we'll see...
The tube in the tumbler can be adjusted (just twist and push/pull) for difficulty - the shorter the tube is, the harder it is for them to get the food. I found I had to set the difficulty higher for Pippin - he could swing it around and get the treats effortlessly.