I had a hard time picking because Lock&Lock has a million containers in the 10-cup-ish size, in slightly different shapes. I think that while this makes deciding tough, it could be very handy for someone who wants to fill their freezer with soup, baking etc, and wants to avoid the wasted space that comes from having gap along the edge or whatnot. You could "Tetris" your freezer with a few sizes & shapes of these babies and utilize every single square inch! If you have specific needs that way and find the selection here is too limited, I suggest the manufacturer's site- it is INCREDIBLE the selection they have there.This is the style that I fell in love with (we've used their 4-5c square for lunches for years & I LOVE having a seal that I can trust! Go ahead & toss one of these full of chili or soup in with your work clothes & shoes in your backpack, then bike to work- you can count on it not leaking! This is the only lunch container I've found that's so trustworthy) by which I mean it has slightly milky plastic and a flag-blue gasket, and a series of bumps that stick out for the lid to grab onto. I also tried something new in this order which is a more brittle (but allegedly much more safe chemical-wise) and clear plastic ("Bisfree") which hasn't got the bumps but has a smaller ridge all along the tub's edge for the flaps to grab. That seems a bit less secure. I don't think I would trust the Bisfree version to throw soup in my backpack. I like that it's safer, so I think I'll choose it for things like freezer storage but I'll keep using this older style of Lock&Lock for packing lunches. I am no expert but I believe even the non-bisfree is still a lot safer than some cheaper brands. The plastic seems very stable- no flex, doesn't scratch easily, no odor even brand-new.I dig the gasket out with a thin-edged spoon (works best for me if I go in at the corner) for more thorough washing. Otherwise a wee bit of liquid can get stuck in the groove around the gasket & that seems unsanitary. I didn't even notice until I stored curry one time and the bright colour of the sauce helped me see the sneaky lingering crud better. The gasket seems to be silicone, not rubber, so again, if you're concerned about unhealthy chemicals leaching into your food, this brand is pretty good.Both the traditional and the Bisfree seem thick and sturdy- not likely to crack, and able to defend your food against yucky fridge & freezer smells. I tried some cheap stuff, I think it was ziploc, and the food absorbed freezer smell after just a month of storage! This stuff- I have stored frozen food for a year with no problems!As for the funny shape of this, I love it! I freeze a bunch of spinach leaves and pull out a few each day to toss into my scrambled eggs. This only holds half a bag of spinach or maybe 3/4 of a bunch, so I guess I could have bought two. But the thing I like is that the surface of the food that is exposed to air is small in this shape of dish, whereas it was large in a typical flat dish. That means my spinach will get less freezer burn in the month or two it takes me to use it up. I recommend this container for anything like that where you will be using a frozen food up slowly. Another example is berries. The plastic bags frozen berries come in let freezer stink in eventually, and with tossing five or ten berries in a smoothie or dish of cereal every couple days, my berries linger in the freezer for months. If I transferred them to a flat dish they'd have a lot of air exposure. In this dish only the small top layer would have air exposure. So I think I'll order another three of these, one for blueberries, one for blackberries, & an extra one for spinach... maybe another one for the kale I sometimes fry with eggs too... Yes, I love this dish!