This is a Zeikka series that means Hot & Cool. This blue-colored glass is a product that was discontinued in the 1970s. It comes with a holder, so you can use it for hot drinks in winter and cold drinks in summer. You can also use it without the holder.
--------------------
《Brand》iittala
《Series》Tsaikka
Design: Timo Sarpaneva
Size: Glass part: φ6.5cm x H8cm Holder part: W10cm x H3cm (including handle)
