Wholesale Sting or Bite Relief: Sting Kill Disposable Swabs Benzocaine Works For Bug Bites Too. Sting Kill is an external anesthetic disposable swab. It contains benzocaine USP 20% for fast temporary relief of pain and itching due to bee stings, insect bites and jellyfish. The Disposable swabs make this product sanitary and convenient. The individual swabs can be carried in your purse, beach bag, glove box etc. This product can be pegged or merchandised on a shelf in the PDQ. This is a great item for the check out area. It is a super impulse item for the spring and summer. There are 5 disposable swabs per card and packed 12 per PDQ.