Jonilyn,
What a warm welcome from you and useful information!
Salaracco,
I have all of the information about steamer baskets for pressure cookers here:
http://www.hippressurecooking.com/pressure-cooker-accessory-steamer-basket/
I generally recommend silicone basket for electric pressure cooker with a non-stick coating, but since Instant Pot is stainless steel you can safely use a metal one – which is more durable, anyway. : )
Ciao,
L