Glass Tupperware

[mojito55]

I want to get into meal prepping but am struggling to find any suitable Tupperware. I would like glass so it's microwaveable and hygienic, and press down lids, not those "fold over" snap ones. The only sets I can find are assorted shapes and sizes, but I'd like them the same size so the meals are even. Has anyone any idea where I might find these? I know I'm being very picky

I've seen these in tesco...but often they are in sets which is annoying as it's never the size you want.

I'd have a look on ebay once you know the size you want and hopefully you might find somewhere with a discount for buying more than one

Most supermarkets.