Medela TheraShells Breast Shells: * For sore, flat/inverted nipples or engorgement * Economical shells; 2 solutions in 1 * Large opening backs help soothe sore nipples and protect from further irritation * Small opening backs help with flat/inverted nipples or engorgement * Low profile design for a natural appearance under clothes * BPA-free Questions about product recalls? Items that are a part of a recall are removed from the Walmart.com site, and are no longer available for purchase. These items include Walmart.com items only, not those of Marketplace sellers. Customers who have purchased a recalled item will be notified by email or by letter sent to the address given at the time of purchase. For complete recall information, go to Walmart Recalls.