It's not for litters but I use trugs as toy boxes. My youngest dogs favourite 'toy' as a pup was a nylabone ring on the end of a piece of cord that got hooked through the trug handle on the way out - he spent hours dashing through the house, bucket an all, scooping up the unwary and bashing the furniture - bliss!!
I use a large potting tray as a hibiscrub foot bath as one of mine gets itchy paws if I don't clean off the mud when we get back from a walk and the other currently has problem nails
I think there are a lot of good ideas/equipment for dogs if you look around aren't there. If you want a more heavyweight trug try the recycled ones (usualy made from tyres) used for horse feed and water so very hard wearing. Next time I get to Mole Valley Farmers I'm picking up one of
these - they were out of stock last I was there