Yes, you just need to adjust the amount of milk

Hello, this is not a timer that ticks and goes from 10 to 0 You set it to 10 (example) without plugging it in. You plug it in. It will blink 10 times and then the red light will continue. 10 hours later the red light will go on flashing slowly. The heater stops. Read the instructions again.

Hello, unfortunately not.

Yes, the cups are made of glass. The lids are plastic.

The replacement glasses for the Severin JG 3525 can be ordered directly from Sertronics AG: verkauf@sertronics.ch Tel. +41 56 417 71 11