You need to press-off the solution from the plastic bottle.

　　你得用力把塑料瓶中的溶液擠出來。

　　I think the dog retrieved the plastic bottle 100 times!

　　我認為狗取回了塑料的瓶子100次！

　　You can use a large plastic bottle whose top was cut off.

　　你可以使用一個瓶頸被砍掉的大塑料瓶。