40 Vintage Kitchen Gadgets From The 50s, 60s and 70s
2.Aluminum ice trays

Aluminum ice trays is not used for this anymore, but it was the top choice for home makers many years ago.
While aluminum does build up a layer that protects the metal from reacting with water, it is not commonly used for ice trays anymore. Plastic or silicone are the material of choice for modern day ice making.