Best Seller! Safe and durable! 
 
Large, clear plastic test tubes are basically indestructible no matter the age of your little scientist. Threaded cap prevents spills. 
Will withstand freezing temperatures or temperatures up to 200° F (will not withstand heat from a flame). Can be washed over and over. 
Set of 15 tubes and caps with activity guide. 
Capacity: approximately 50 ml (1.75 oz.). 6 in. L x 7/8 in. dia.