I purchased a slow-feeder dog bowl to keep my dog from inhaling his food, but because he's a French Bulldog with a flat face he wasn't able to get food out of included food bowl at all.

Here's the bowl I purchased:
https://www.walmart.com/ip/Taglory-Elevated-Dog-Bowls-with-Slow-Feeder-Adjust-4-Heights-for-Small-Medium-Large-Dogs-Black/3428939595

I designed this to fit specifically into that elevated dog bowl and to be more shallow and "easier" for him to eat from, but it can be used without it. I tried a few different bowl depths and settled on the current value of 25mm - which still takes him about 3-5 minutes to eat.

I printed this specifically in PLA because from what I've read its more "food safe" than other filaments, but it definitely wont survive the dishwasher, so it's hand rinse only.