Historica:
Until 18 Century were made in the wake of the spread of commerce and the development of the arts repeated attempts to produce glass pens as an alternative to previously used goose feather.
Why is the glass Venetian glass pen nib is usually called, is unclear. While there are many sources on the development of the glass of Murano, near Venice in the spring in the 17 Century point, however, the similarity of the texts appear to contain the different sources that all point sources to each other. Its origin remains unclear. Nevertheless, one can observe that the term "Venetian glass pen is" has become a generic term and refers to writing instruments made of glass, regardless of whether they originate from Venice or not. (Source: wikipedia)

Slight variations in color, shape and size are possible, since it is entirely handmade.

Our drinking horns come primarily from Africa and South America.
The animals from which the horns were not subject to the CITES agreement and were responsible for the slaughter. (The horn is a waste product of meat production.)
In addition, all horns and a veterinary check risk of infection with the cattle disease BSE and foot & mouth disease is not present.

All horn-items are made of genuine natural horn, chemically cleaned and hygienic food inside additionally painted.
It is pure natural products, only here in Germany are made by hand.
Certain differences in the implementation and design are natural and unavoidable. The colors can be very light to very dark vary.