When they're getting their heads and hands around open cup drinking. the 2-Pack Silicone Cup is a great pick. Made from sturdy silicone. they're pretty near unbreakable and are light. non-slip and easy-to-grip. Plus. with two in the pack. they'll always have one in use and one in the dishwasher. 

• Material: 100 % silicone
• Size: 9.3cm W x 6.5cm H
  
• Cleaning Instruction: Dishwasher safe