Product detailsConstructed with the finest stainless steel. Pioneer products are guaranteed to be leak proof and durable. All of our vacuum stainless steel products keep drinks hot for 7 hours, or cold for 24 hours. Our Pioneer vacuum ware ranges are created with function and durability in mind, while always keeping an eye out for cool designs. Getting your daily enough of water can be difficult. Staying hydrated means staying healthy. Best use in kitchen and in schools and offices. Easy to carry. Inside a Vacuum Flask. Protective outer casing. Reflective stainless steel layer prevents heat energy from radiating outwards.?Constructed with the finest stainless steel. Pioneer products are guaranteed to be leak proof and durable. All of our vacuum stainless steel products keep drinks hot for 7 hours, or cold for 24 hours. Our Pioneer vacuum ware ranges are created with function and durability in mind, while always keeping an eye out for cool designs. Getting your daily enough of water can be difficult. Staying hydrated means staying healthy. Best use in kitchen and in schools and offices. Easy to carry. Inside a Vacuum Flask. Protective outer casing. Reflective stainless steel layer prevents heat energy from radiating outwards.