Those plastic ones are a lot more economical, but they almost feel too disposable. Like, they're perfect if you lend out your tupperware, since who cares if you don't get it back, but for not a ton more, I don't mind going for the hard plastic ones or even the occasional glass one.
I know I've seen some that tout how it's basically impossible for it to leak, but I can't for the life of me recall the brand. They'd be a must-have if I ever had to actually transport my meals. I'm too much of a spaz not to worry about a vat of soup rushing out of a container in my bag.
I know it's just a food scale, but I'm already loving this thing. Seems accurate and the design is sleek and understated. Good stuff all around.