robo hand gripper -- for can handle size of 1 ltr water bottles and

 https://www.aliexpress.com/item/4000859864251.html

• Compact and lightweight for easy storage With a package size of 20 x 20 x 5 cm and a weight of 0.100 kg, this robotic claw is easy to store and transport. Its small footprint makes it ideal for classroom setups, home labs, or portable project workspaces.