We used it for the first time on our child, who got stung by something while playing in the sand, possibly a wasp. It drew out a white liquid from the child's finger and immediately relieved the pain. Truly effective and useful in the countryside and at the beach or on trips, where there is a risk of insect bites. It has two different suction cups, one smaller and one larger, depending on the area where one wants to use it. These suction cups are multi-purpose and washable. It is worth purchasing.