If you are winding up with mispunctured chargers, it's your canister, not the chargers. 8 gram chargers physically are 8 gram chargers. Ultra pure whip has a more delicate seal and cracks easier, but if you haven't spent over $60 on your dispenser, that's your puncturing issue. Second, if you want better tasting result from your chargers and you have not bought a Nitrokit, that's the issue. Ultra pure whip tastes better out of the charger, however, a Nitrokit will solve the issue of residue. Also, even UPW leaves a residue, it is virtually impossible to break open a charger without some form of buildup. This is a quality product, and I have liked Leland's because they were the first that I bought in bulk, and it's nostalgia. You can obviously find better quality, but these are not bad, and aside from that, I got my order in 3 days when it was projected for 7. I think that's pretty much what makes this a worthwhile buy.