Heat preservation barrel, commonly known as wealth-generating barrel, is a kind of barrel with a cover. It can be roughly divided into two categories: one is made of resin and the other is made of stainless steel. No need to plug in, the heat preservation time is about 6 hours, and the cold preservation time can reach more than 12 hours. Stainless steel heat preservation barrel, the inner container is made of 304# stainless steel plate, which will not rust and is durable. Generally used to hold milk tea, drinks, fruit juice, milk and so on. Keep it fresh. It is a must-have for tea shops and herbal tea shops. The capacity is 10L and 12L. The height is generally 44-45 cm and the diameter is 25 cm. The market price is generally between 170-300 yuan, with or without temperature display.