1. Rising cost of raw materials: with the rise in prices, raw materials, packaging costs, etc. are also increasing, resulting in the production cost of drinks under 5 dollars is getting higher and higher.

2. Changes in market demand: consumer demand for beverage quality is getting higher and higher, the demand for poor quality, low-priced beverages is reduced, while the demand for healthy, high-quality, high-nutritional beverages increased.

3. Policy regulation: In order to protect the health of consumers, the government has strictly regulated the processing ingredients, nutritional composition and packaging materials of beverages, and restricted or eliminated low-priced and low-quality beverages.

In order to solve this problem, some solutions need to be explored, such as:

1. Improve the quality of beverages, enhance the brand image, and meet the growing consumer demand.

2. Innovative products: develop new types of beverages that are more in line with market demand and relatively low cost.

3. Adjust the pricing strategy: according to market demand and cost, adjust the pricing of products reasonably, so that the drinks under 5 yuan can maintain product quality and ensure the corresponding profits.

There are a number of beverages below $5 that do not increase in price all year round, mainly:

1. Iced tea: a refreshing, nutritious and affordable beverage.

2. Iced green tea: has a good taste, high nutritional value, moderate price, favored by consumers.

3. Lemonade: Lemonade is refreshing and pleasant, with a sweet and sour taste, and it is a health drink that is rich in vitamin C and clears heat.

4. Sugarcane juice: it is a healthy, natural, refreshing and nutritious low-calorie drink with affordable price, which is favored by consumers.

The above are some examples of beverages under $5 that do not increase in price all year round. However, due to the ever-changing market environment, the price may be affected, and consumers are advised to pay attention to verifying the price and carefully reading the label on the product package when purchasing.