I ride my bicycle to grab my groceries. Any tips how/trick to keep my eggs from getting squished?

Put your carton of eggs on top of everything else in your backpack. You can also put the carton in a plastic grocery bag and tie it to the handle bars. Eitherway, your eggs should be fine.

Keep your egss in a separate compartment from the rest of your stuff. Or what about a little platform (not sure what they are called) that you mount behind your seat.Or you could just attatch a basket when you go to and from the store.

I would buy a plastic container from the dollar store where I can place the eggs. Those stores specialized in camping equipment have some egg containers and are more expensive than the dollar store.

before u put them in yr backpack light a campfire and hard boil them in the shells for about 6 mins, then immerse in cold water , keeping the shells intact

Handlebar basket.

get a basket attached to the front of ur bike

Wrap them in something like a towel.

Put it your backpack and double bag it.