1. Online shopping: You can search for "Duoyouyou probiotic solid drinks" on major e-commerce platforms and choose reputable merchants to buy them. These merchants usually provide fast and safe express delivery service to ensure timely receipt of products.

2. Drug store purchase: You can also go to the local drug chain store or drug store to ask if there are any excellent probiotic solid drinks for sale. These pharmacies will provide professional advice and guidance to meet health needs.

3. Supermarket purchase: Some large supermarkets will also sell many excellent probiotic solid drinks, which are on the shelves of health care products or nutrition products in supermarkets. Buy here, you can compare different products at the same time and choose the most suitable probiotic solid drink.