Costco "tupperware" Type containers

I discovered these containers in Costco, which are just like the plastic ones you get in some takeaways. They cost £5 plus VAT for 100 500ml lidded containers, which are freezer and micorwave safe, and which can be washed in the dishwasher (top shelf). I think they are brilliant, becuase they stack inside each other and take up hardly any space in the cupboard and they are see-through so you know what you are getting out of the freezer. I find that each one freezes a good sized single portion of curry and rice, spaghetti bolognaise, cottage pie, scouse etc, and two good sized portions of just curry sauce, or meat and gravy etc. The lids fit really tightly so there is no spillage either and you just release the lid a little bit to microwave so there is no splattering. I have been getting about 6 uses out of each container (after that they get a bit out of shape and the lid doesn't fit as well, but I still think they are great value.