Have had a few misses using my beer capper, the wing capper. The odd bottle has not carbonated properly due to caps being crooked etc. Anyhow, bought a dozen Grolsch that have a swing top cap, rubber seal looks decent, My local homebrew shop have these bottles for 2 quid each however i prefer to have bought bottles with beer in them. Are the Grolsch bottles decent for my homebrew and do they last a decent amount of time after repeated use. They were 50p cheaper than buying empty swing tops so i thought what the hell..