glass pipes

Many kinds of glass pipes here in our factory for your reference,
It is made of glass materials;
There are transparent and multi-colours for your reference;
The size is usually about 10cm in length, and about 60g in weight; 15cm, 20cm,25cm, 50cm in length, etc, as you like because we can make new molds for it. 
There are 11 samples in the attached picture, with yellow and black colours, in different shapes.