水筒 すいとう Meanings Noun canteen; flask; water bottle; thermos Kanji 水 water. Read as スイ. 筒 tube. Read as トウ. Example sentences 水筒にはほとんど水が残っていない。There is little water left in the canteen. 僕の水筒、空っぽなんだけど。My water bottle is empty. 僕の水筒、どこかな?Where's my water bottle? Word lists JLPT N2 Jinuma: Japanese Dictionary · Word lists