I bought two 460ml and two 760ml containers and they meet all my expectations. As they are pricey compared to other containers, I was hesitant to order more. After several fridge storage and dishwasher trips, they are unmarked and look brand new. I like them so much that I plan to order a few more.
(I recommend that lids be kept out of the microwave and dishwasher.)
I would recommend this product to a friend.