Product name	Boston
Material	glass
Color	brown, blue, transparent
Technology	machine blowing
Function	It can be used to spray liquid, such as watering flowers, etc.
Applicable	gardening, family, outdoor and other places
Features	Various specifications, rigorous workmanship, multifunctional use, convenient spraying, adjustable water output, press spraying, simple operation, transparent design, clear water level and excellent sealing performance.

The principle of the watering can is that the water level produces a pressure difference, and the high pressure in the pot makes the water spray out. It also uses the pressure principle. When the pressure is certain, the smaller the area, the greater the pressure and the farther the spray. Therefore, the nozzle of the spray pot is composed of many eyes with very small area. In addition, it also uses the pressure balance principle. There are always multiple vents on the top of the watering can, which is to allow air to enter, so as to achieve the balance of internal and external atmospheric pressure. If there is no vent, water cannot be poured out. Use the following steps: 1. First, pump air into the pot. The air above the liquid level in the pot increases, and the pressure increases, which is greater than the external atmospheric pressure, and the liquid in the pot will be pressed into the pipe. 2. Secondly, press the watering can. After spraying the liquid medicine, you can also smell the smell of the liquid medicine in the distance. This is the result of the continuous movement of molecules, which belongs to the diffusion phenomenon. 3. In addition, if it is used at home or in an office with an area of less than 200 square meters, we will generally use a watering can with a capacity of less than 1000ml, which is relatively simple and convenient to use.