Hyacinth Vases ready to fill with hyacinth bulbs...a  very Danish way of 'forcing' Hyacinths to be enjoyed indoors. We fondly remember the scent and seeing them in window sills during the first months of the year. (In Denmark you also cover them with a pointed paper hat until they are ready to pop).

Glass vase 15cm tall by 8/7.5cm at the base.
Prepared Hyacinth bulbs available here

To use, fill the vase with water...halfway up is usually enough  as the moisture from the water that will make the bulb bloom and if it sits directly in the water it may cause the bulb to rot). Place the prepared bulb on top of the opening of the vase and watch it open and bloom over the next few weeks. 
Please note that it will flower much faster inside a warm room or sunny window sill than if kept in a conservatory for instance. The bulbs can be planted out outside once they have flowered.