the web is indeed conjugated incorrectly.
the correct way of saying it would be:
juan y david beben leche.
the mistake was that before it was beban with an a instead of an e
since the original word is beber you know that you will be using e since it ends in the -er form.
hope this ! : 3
una envoltura its a envelope
1.hola, 2. de nada, 3. nunca, 4. bueno, 5. buenos dias,. 6. feliz cumpleaños