To play, you change one word of the previous phrase. For example:

Cereal box can become cereal flavor or big box.

I will start: Electronic mail

Snail mail.

Snail shell

Berry shell

Berry picking

apple picking

apple cider

apple tree

apple juice

grape juice

grape salad

taco salad

Taco seasoning

German seasoning

German food

fast food

fast forward

flash forward

Flash back

Back bonding.