Right now on Amazon you can grab Pyrex Pie Plate Portable  for just $9.69.
I have seen these for cakes before but not for pies! (Although to be clear I am a BIG supporter of pies.)
- Portable pie plate makes transporting to potlucks and picnics easy
- 9-inch glass pie plate with durable, BPA-free plastic cover and base
- Easy-to-lock lid securely fastens to base; multiple handles on top or bottom
- Glass is pre-heated oven-, microwave-, fridge-, freezer-, and dishwasher-safe
- Made in USA; 2-year limited warranty
The average price has been about $18 so this is a nice drop!