DIY Shower Head--Is it safe?

[ILoveBirbs]

I really want to help my birds take a bath. One of my birds, Yahtzee, seemed to like it when I held some water in my hand and let it drip on him. I thought I needed a watering can, so I was looking up DIY watering cans. One of the blogs I found said to use an empty milk jug and poke holes in the top with a needle that's been heated by a lighter.

I wasn't really sure if I should use a milk jug because I'm not sure if I'll be able to get it 100% clean.

So instead, I had the idea to use the same method, but on a Hefty solo cup. It worked (RIP to my needle *sobs* ) but now I'm worried if the melted plastic might be dangerous for the birds? I washed the cup with really hot water and Dawn dish washing soap, but I'm still paranoid ^^;