iSi Soda Siphon - 26 oz Stainless Steel Whipped Cream Dispenser & Carbonated Drink Maker for Home Bar, Coffee Shops, and DIY Beverages

Contrary to experiences of some other users here, I inserted one of my new Leland co2 cartridges into the isi stainless steel siphon, and it worked perfectly. No gas leakage. Before this, I had filled the siphon with water, put in refrigerator for a few hours, then started the co2 release. Afterwards, following suggestions of other reviewers, gave it 20-30 shakes to better dissolve the co2 in the water. Filled a glass with definitely well carbonated water, probably even more charged, than some store bought bottled soda water. No strange after taste noted, either.Shims not required for Leland cartridge. I think some folks did not sufficiently tighten the charger unit before initiating the final twist, so the seal was not properly made, and gas escaped. Turn the holder with the charger until some resistance is felt, which is when the pointed unit in the siphon head is up against the metal seal of the cartridge, then get proper grip on the siphon and charger to allow about a 180 degree twist, executed rapidly to assure an internal seal, otherwise some gas will leak. The addition of a shim should not be necessary, but may ease the process for some folks. Also, there are several models of isi siphons, so other models may have issues with non-isi cartridges. And thanks to other Amazon reviewers for their helpful suggestions with isi siphons.