I wanted to improve my trash situation to integrate a better recycling system.
I cleared out space in the lower half of a tall kitchen cabinet and bought two Slim Jims, a black one for garbage and the blue one for recycling. Together, they fit perfectly in the space.
Lots of thoughtful features: handles, bag vents, slits to anchor bags, etc. Very well designed. And they fit 30 gallon bags perfectly. When you fold the top of that size bag around the top, it's easy, but hugs so it will stay put. One of my biggest gripes with cans is how often they don't work with standard bag sizes. These do. They are built to last and solve a common space issue.
I also recommend buying the top. It's a little pricey, but rounds out a great product.
PS: A couple people here left one star reviews because they felt the ad was misleading. They expected to receive four. I can only guess a former version of Amazon's page gave that impression, or they both misread it similarly (or they were both from 1 really angry person leaving reviews under different names:)...doesn't matter. Those ads were about squabbles with Amazon and not about the quality of the item. The product itself is great. So understand you are only getting one for the price and ignore the comments.