[sushi_78]

Indigestible isn't the same thing as dangerous. It simply means it can't be broken down into useful nutrients by the digestive tract. A lot of our food is indigestible - insoluble fibre, small seeds and so on. Also wood is indigestible or very poorly broken down by the digestive tract but that doesn't make all wooden things dangerous because hamsters don't typically swallow their bedding or what they chew in any significant quantities. Even paper bedding would be dangerous if a hamster decided to swallow lots of it but fortunately hamsters instinctively know that it's not something that ought to be swallowed. I don't know if it's the case with hamsters, but some rodents actually have a flap of flesh in their mouths that prevents bits of wood or whatever they are gnawing from reaching the throat and being swallowed. Hamsters are really quite a bit more robust than their small size might suggest!

There's no reason to believe a hamster occasionally swallowing a microscopic plastic particle is any more dangerous than a child occasionally swallowing a small plastic bead (likely less dangerous as they can't choke on a microscopic particle). Most plastics (and definitely the ones used near food products) are chemically inert which means they don't cause any kind of toxicity in the body (human, hamster or otherwise) and the only risk is that of an actual physical obstruction or injury from a large piece of plastic which isn't a risk with teabag bedding due to the tiny size of the particles.