Nnwale Tube bụ okwu nwere ike na-ezo aka n'ihe dị iche iche dabere na ọnọdụ. N'ihe gbasara sayensị, tube nnwale bụ iko cylindrical ma ọ bụ tube rọba nke a na-eji ejide ma gwakọta obere mmiri mmiri n'oge nnwale na ụlọ nyocha. A na-ejikarị ya eme ihe na kemistri, bayoloji, na ọzụzụ sayensị ndị ọzọ.
N'echiche sara mbara, "Test Tube" nwekwara ike na-ezo aka na ọwa YouTube a na-akpọ "TestTube," nke bụ ọwa sayensị na agụmakwụkwọ na-ewu ewu nke Discovery Digital Networks nwere. Ọwa ahụ na-ekpuchi isiokwu dịgasị iche iche, gụnyere sayensị, teknụzụ, akụkọ ihe mere eme, na omenala, ma na-enye ihe ọmụma na vidiyo na-atọ ụtọ maka ndị na-ekiri ya.