Made of food-grade silicone, they make 56 ice cubes.
Brad's Deals Editor Marisa,
This 4-Pack of Silicone Ice Cube Trays with Spill-Resistant Removable Lids is $11.99 at Amazon. This gets you each lidded ice cube tray for only $3. We found one site selling a similar one for $4, but most ice cube trays like this are sold for around $6-8. This means it would cost you $24 for four of them! Prime members get free shipping. Non-members get free shipping at $25, otherwise it adds $5.99. Sales tax is charged in most states.