Type:
These are Tingli brand food storage containers, specifically marketed for keeping food "really fresh".
Features:
They are typically made of durable, BPA-free, and often oven-proof acrylic or polypropylene, and are designed to be easy to clean and dishwasher safe.
Sizes:
The set shown appears to be a multi-size set, with options like 1200ml, 2100ml, and 3200ml available in similar sets.