A clean set of 3 minimalist line-art (outline) icons in a single consistent style, arranged in a horizontal row on a transparent/white background. All icons use thin, uniform stroke weight in dark charcoal color (#3a3a3a), modern and elegant, matching a premium thermos flask product card design.
Icon 1 — STAINLESS STEEL BODY: an outline of a thermos/water bottle with a subtle shine/gloss line indicating durable stainless steel material.
Icon 2 — INNER FLASK (food-grade stainless steel): an outline of a thermos shown in cross-section with visible double walls, or a cup/flask with a drop inside, symbolizing the safe inner flask.
Icon 3 — TEMPERATURE RETENTION up to 48 hours (keeps hot and cold): a combination of a snowflake and a heat/steam element (or a thermometer with sun and snowflake), symbolizing both cold and heat retention.
Consistent line thickness across all three icons, equal size, balanced spacing, professional flat vector look, no color fills, no shadows, transparent background.
