Ello Kids Colby 12oz Stainless Steel Insulated Water Bottle with Straw and Built-In Silicone Coaster (Lilac/Pink)

It's a great product - easy for our children to use, not so hard to clean, etc. Best I've found so far. BUT, the little white plastic circular part in the lid keeps getting lost (I just ordered our third replacement bottle). I wish it came with some extras, because those tiny parts can get lost so easily. Also, I wish I could get stainless steel straws that fit this bottle. Ello has stainless cocktail straws that sort of fit (a bit short), but those have color painted on them and I want them to be just stainless steel.

Love the bottle but came here looking for replacement parts. The plastic valve pieces just seem to fall out and disappear. It's such a small little piece, we just want to replace that rather than an entire bottle. I guess the other downside is that when you let the bottle sit out with a cold drink in it, as it warms up the pressure builds so if you open the cap, it squirts out and can make a mess.