Is There a Problem with Flowing Liquids and Reference to Memchaik? (e.g., Baby Oil, Sanitizers, Liquid Hand Creams, Vitamin E Oil, etc.);
is there a difference when opening a bag if the top or bottom is glued or just stuck together without a intermedium in between;
"צביעה באוכלים" (coloring in foods) - the stringent view of some poskim