With
Recaps Stainless Steel Refillable Capsules Reusable Pods, you're free to build the perfect espresso-like shot on your own terms.
There are more reusable espresso pods on the market than for any other pod coffee or espresso system, and the best pod for a Nespresso system is the Recaps Stainless Steel Refillable Capsules Reusable Pods, followed by Sealpod Stainless Steel Refillable Pods.
Recaps and Sealpods are essentially the same contraptions: stainless-steel cups with single-use (disposable) aluminum lids that stamp on and peel off. The differences lie mostly in the kits themselves, and Recaps, which comes with three refillable pods (as opposed to Sealpods' five), also comes with a tamper, and costs nearly $20 less than Sealpods. The fitted tamper is a huge help, especially when dealing with such tiny capsules, and made my experience filling them far less painstaking.
With that said, filling these pods is a chore. It gets easier the more you do it, but it is something you might accomplish better by sitting down. It's also tricky to learn the optimal size for grounds and tamping to produce a good shot in any given machine. I'm still dialing mine in, but I do on occasion get a much better shot than with the pre-filled Nespresso and third-party pods.
What the Recaps and Sealpods aren't is environmentally friendly because you do throw away the lid after each use. The most eco-friendly option for Nespresso pod machines is by WayCap, which is all stainless-steel (save for a rubber or plastic O-ring to help forge a seal in the machine). The problem with WayCap is that it's difficult to get it to work to build up enough pressure for anything close to espresso. There are, however, multiple tops that come in this kit, and if you can figure out your grind and packing density, there's a good chance you'll be happy with WayCap. Here's a little video guide that the company put together.
The only pods I've learned to get a good shot out of with any consistency have been Recaps' refillable plastic snap-on lid model, but they can be a little tricky to get right, and you do end up having to trash them after about 100 uses. I'd recommend them, but they're still a nuisance in their own right and because they have a limited lifespan, they're not the most eco-friendly.
Amazon reviews for Recaps and Sealpods are not overwhelmingly positive (3.7 stars based on over 200 reviews and 3.8 stars based on over 260 reviews, respectively), and that's probably because these things, as I've already said, are tricky to get dialed. Wirecutter included a section on reusable pods in their guide to pod machines, but only tried the Sealpods based on their slightly stronger Amazon reviews. Having thoroughly tried both Sealpods and Recaps, they differ only negligibly, save for price, which is a huge difference of over $20. I say save yourself the money and go with Recaps (the stainless steel tamper is a nice touch, too).
Pros: (Sort of) environmentally friendly, much more cost-effective than single-use pods
Cons: Still somewhat wasteful with single-use aluminum foil glue-on tops
Buy a three-pack kit of Recaps resealable pods (with 120 single-use lids) from Amazon for $36.99
Buy a three-pack of Recaps plastic refillable pods on Amazon for $6.99
Buy a five-pack of Sealpods with 100 single-use lids from Amazon for $59.90