I use these bottles that I found on Amazon. They hold 8 ounces and take up relatively little space in the fridge.
While I am in the US, I've seen Glen, of Glen and Friends Cooking, use them on his YouTube channel and he is in Toronto, so they should be available.
I use these for batching lime juice, lemon, syrups etc
North Mountain Supply 8 Ounce Glass Stout Sauce Bottle - with 38mm Black Plastic Lids - Case of 12 https://www.amazon.ca/dp/B07PVCHPC5/ref=cm_sw_r_cp_api_glt_i_SDZMQS008YMWN31DHSVR
https://www.amazon.com/dp/B07PVCHPC5?psc=1&ref=ppx_yo2ov_dt_b_product_details
I use these 8 oz. ones. Perfect serving size for me, too.
For OP, you can get replacement lids (for better seal) which are called F217 lids:
https://www.amazon.com/dp/B084T99C98?psc=1&ref=ppx_yo2ov_dt_b_product_details
They are a US made 8 Ounce Glass Stout Sauce Bottle available on Amazon. Great for thick sauces.
I like these, $2 CAD each. link