Suppose that the amount of paint that goes into a 4-L can is uniformly distributed between 3.85

Question:

Suppose that the amount of paint that goes into a 4-L can is uniformly distributed between 3.85 L and 4.15 L.
Suppose the manufacturer wants the amount of paint in a can to be within 0.5 standard deviations of the mean. Based on the probability of this happening, are these realistic expectations?