Part of the recent updates to Financial Peace University included the removal of the envelope systems from the FPU membership material. However, you are still eligible to receive an envelope system if you would like.
When you sign into FinancialPeace.com click My Profile inside the left navigation. Underneath your name you should see a Notifications link. Click Notifications and you should see the message about receiving your envelope system.
If you decide you would like to receive an envelope system you'll just need to pay a small fee for the shipping.