In this scenario, it is likely that Bob and his business would be liable for the injuries sustained by Lester.
Bob's business has a duty of care to ensure that their products are delivered safely and without causing harm to others. The fact that Bob dropped a coffee urn on Lester indicates that he may have breached this duty of care. Additionally, the fact that the coffee was hot and scalded Lester may indicate that Bob's business did not take proper precautions to ensure that the coffee was at a safe temperature before transporting it.
Furthermore, since the incident occurred while Bob was delivering the coffee and donuts to Smith Co.'s local office, it is possible that Smith Co. could also be held liable for the injuries sustained by Lester. This would depend on the specific circumstances of the incident, such as whether or not Smith Co. provided a safe environment for Bob to deliver the products and whether or not they knew or should have known of any potential hazards that could result in injury.
In any case, it is important for Bob and his business to have adequate insurance coverage to protect against liability claims and to take steps to ensure the safety of their products and operations. In this specific scenario, Lester may have grounds to pursue legal action to recover damages for his injuries, and Bob's business may be held responsible for compensating him for any medical expenses, lost wages, and other damages resulting from the incident.