Item no lem984.
The so-called window spacing between the glass.
Manufacturer, Riihimäki glass. Year, 1940's.
Height 12.5 cm, diameter 6 cm.
The weight difference in the glasses.
Glass is an intermediate glass that is meant to collect moisture between the outer and inner windows (wool or lichen..

Item No. de738.
Art Glass Bottle, Palkki.
Design, Helena Tynell, Riihimäki glass.
Height 27.5 cm, width 17.5 cm x 7 cm.
Also known as "Lankkupullo"...