Strong's #2894: kophinos (pronounced kof'-ee-nos)
 of uncertain derivation; a (small) basket:--basket.
Thayer's Greek Lexicon:
 ́ 
 
  kophinos 
 
 1) a basket, wicker basket
 
  Part of Speech: noun masculine
Relation: of uncertain derivation
 
Usage:
This word is used 6 times:
Matthew 14:20: "fragments that remained twelve  baskets full."
Matthew 16:9: "five thousand, and how many  baskets ye took up?"
Mark 6:43: "And they took up twelve  baskets full of the fragments, and of"
Mark 8:19: "among five thousand, how many  baskets full of fragments took ye up? They say"
Luke 9:17: "that remained to them twelve  baskets."
John 6:13: "and filled twelve  baskets with the fragments of the five"