Minos, I think that it is brilliant that you are not putting the cat litter into landfill. Congratulations
As part of the Master Composter course I did provided by Norfolk Council and Garden Organic, we were taken to a landfill site. It really felt like the place that God forgot. All the local trees were festooned with plastic bags. The areas that had been 'capped off' had to have pipes coming out of the top to release Methane and pipes coming out of the base to release Leachate. The guys working there said that if their clothes were contaminated with even the smallest amount of this Leachate, no amount of washing would get rid of the smell; you simply had to bin the clothes.
The EU banned the creation of new landfills some years ago, and quite rightly! Landfill sites cannot be used for housing, farming or indeed anything else as the toxic fumes preclude any further use for 100's of years. We are simply poisoning the land (our country) with landfill.
Palaisglide, I keep an old watering can for my " recycling" Mercifully out of sight of everyone.
Hostafan, something with a nice tight cap will stop the smell and keep the flies out, saying that with a watering can you will not need the funnel-- to stop the splashes of course.