The foil milk bottle tops from good old fashioned milk bottles can be recycled. This is foil and can go into your blue top kerbside recycling bin.
As they are small, I would suggest you do as I do: As you use them pop them, clean and dry, into a small pot and then with all your other small bits of foil, roll them up into a ball. When the ball gets to the size of a tennis ball pop it into your recycling bin. At this size it will not get mixed up with other recycling and will not block up the mechanical sorting machinery at our recycling plant.