Admittedly I haven't been in an actual store in years, but TJMaxx and such used to occasionally have Oxo containers for decent prices. I've also found some sets for cheap at random websites over the years. I only mention in case slightly lower prices would put them in the realm of affordablility - prices can vary a lot if you watch for a bit. The pop tops are a dream IMO, but yeah, still relatively expensive, so I have just a couple for things I use frequently.

For everything else I use large mason jars, have slowly accumulating glass latch jars (they pop up in thrift stores frequently and sometimes go on big sales in stores), and polycarbonate bins/buckets from restaurant supply. Highly recommend hitting up a restaurant supply store; they sell things meant to stand up to commercial kitchen abuse and it's often cheaper than what you'd find sold at Target or popular on Amazon or whatever.