If you just hopped on the Inkbird Sous Vide deal and looking for an alternative to plastic, these Stasher branded silicone pouches are heavily discounted and well regarded online.
3L Stand-up Mega Bag was $75, now $15 - https://www.petersofkensington.com.au/tableware/outdoor-dini…
1.66L Stand-up Mid Bag was $55, now $11 - https://www.petersofkensington.com.au/tableware/outdoor-dini…
0.82L Stand-up Mini Bag was $50, now $10 - https://www.petersofkensington.com.au/tableware/outdoor-dini…
Looks great, although I wonder how well you can get all the air out of the bags for sous viding.