Alternative milk jugs are not only essential for steaming and frothing non-dairy milk options, but they are also important to avoid cross-contamination in coffee shops and other foodservice settings. Using a separate milk jug for non-dairy milk ensures that there is no cross-contamination with regular milk, which is crucial for individuals with lactose intolerance or dairy allergies. 

When a barista steams and froths regular milk, the milk proteins can stick to the inside of the milk jug. If the same jug is used to steam non-dairy milk, the residual milk proteins can contaminate the non-dairy milk, causing an allergic reaction for someone with a dairy allergy. This can be a serious health risk, and using separate alternative milk jugs can help prevent it. 

The Barista Progear Alternative milk jugs feature a highly visible marking on both sides to ensure that there is no confusion between regular and non-dairy milk jugs. This helps baristas and other staff members to quickly identify the correct jug for the specific milk option.