感溫變色哨音飲管 (Taiwan)

此飲管有四項功能 :
(1) 吹或吸時能發出哨音
(2) 溫度低於17 degreeC 時變紅色
(3) 作為吸管吸吮飲料
(4) 使學生認識熱敏變色物質(新物質)
Item no : JHL 677 pk of 5 pair

Thermal Straws (Taiwan)
Straws properties
(1) suck and blow with sound
(2) temperature below 17 degree C with change colour
(3) ordinary simple straws for drinking
(4) new material for thermal (colour change feature)
Item no : JHL 677 pk of 5 pair

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