eWaste Disposal Inc. offers certified product destruction and disposal services, including for food and beverage waste. They have a location in Santa Fe Springs, CA that may be able to assist with almond milk disposal. You can contact them at their Los Angeles location:
13037 Lakeland Road, Suite A
Santa Fe Springs, CA 90670
Ph: 949-466-8857
ewastedisposal@gmail.com
Additionally, you can check with your local waste management or recycling center for guidance on proper disposal of almond milk.