Fleshlights such things, the first military, you do not know is normal.
The airplane with a special glass cup is closed very tight, the first is the protection, in order to meet the drinking water mission of specially designed. Later into the folk, we commonly known as the fleshlights.
First of all, in order to cope with the fleshlights in turbulence, to ensure that the inside of the liquid can not leak, the appearance of the fleshlights and a layer of inner cup body, the liner material is PVC, elastic, to make sure that no flight because too bumpy and Water Leakage.
At the same time the fleshlights inside the set of high elastic silicone layer, liquid can be put into, but not easily flow out. So after the use of the aircraft cup to be carefully cleaned, so as to avoid internal liquid corruption.
At the same time to drink the cup because way of flying down, the rubber layer are arranged outside the fleshlights, a good grip, but also to prevent falling after smashed equipment.
This kind of thing is because of the military civilian, fleshlights unique design and high material costs, lead is not very popular consumer goods, and the other is too rough, not suitable for girls to use, so you don’t know what is normal.