The Hibachis from Primal Core still have a vanilla glass recipe. 2 out 3 hibachis are craftable. The Terracotta Hibachi is craftable as soon as iron becomes available. You can even automated it. And it is a lot faster than melting and casting glass. I would suggest removing the hibachis completely, since they are not relevant tech in this pack.
The Hibachis from Primal Core still have a vanilla glass recipe. 2 out 3 hibachis are craftable. The Terracotta Hibachi is craftable as soon as iron becomes available. You can even automated it. And it is a lot faster than melting and casting glass. I would suggest removing the hibachis completely, since they are not relevant tech in this pack.